My understanding is that the mission.sqf export function has to be part of the template. If you want to copy and paste something via Ares you need to use the other copy function that gives you a text box. Copy all the text in that box and use the paste function.
An example of this is the following [["Land_MetalBarrel_empty_F",[2231.17,4123.53,47.9663],0.0483583,1,0],["Land_PlasticCase_01_small_F",[2230.92,4124.33,47.7613],359.038,1,0],["PortableHelipadLight_01_yellow_F",[2225.49,4119.05,47.1297],359.534,1,0],["PortableHelipadLight_01_green_F",[2220.34,4124.12,47.2569],358.913,1,0],["Land_HelipadCircle_F",[2220.35,4124.16,47.1472],359.645,1,0],["PortableHelipadLight_01_yellow_F",[2225.51,4129.64,47.8321],359.768,1,0],["Windsock_01_F",[2230.83,4134.76,49.4147],0.0779472,1,0],["PortableHelipadLight_01_yellow_F",[2214.72,4119.06,46.3987],359.517,1,0],["Land_Pallet_MilBoxes_F",[2209.67,4118.27,46.2298],359.958,1,0],["ACE_Wheel",[2273.34,4121.61,152.079],270.946,1,0],["PortableHelipadLight_01_yellow_F",[2214.82,4129.52,46.9129],0.0284077,1,0],["Land_MetalBarrel_F",[2209.97,4124.61,46.4693],358.298,1,0.132541],["Land_MetalBarrel_F",[2210.01,4125.36,46.5067],358.696,1,0.233653],["Land_Cargo_HQ_V1_F",[2278.42,4109.41,54.6134],0.733228,1,0],["Land_MetalBarrel_F",[2209.46,4125.09,46.4409],358.636,1,0.27903],["RHS_Ural_MSV_01",[2250.75,4070.66,49.4167],181.83,1,0],["Land_BagFence_Long_F",[2269.06,4078.83,49.0839],113.946,1,0],["FlexibleTank_01_forest_F",[2209.82,4131.97,46.9004],359.612,1,0.0970903],["RHS_Ural_MSV_01",[2279.73,4121.46,52.2828],270.946,1,0],["FlexibleTank_01_forest_F",[2209.78,4133.07,46.9594],359.654,1,0.0973058],["ACE_Wheel",[2245.37,4066.51,149.186],181.83,1,0],["Land_BagFence_Long_F",[2268.68,4075.97,48.8872],82.1285,1,0],["Land_BagFence_Long_F",[2276.43,4082.48,49.9555],196.775,1,0],["RDS_DSHKM_CSAT",[2285.69,4107.64,55.5035],115.068,1,0],["Land_BagFence_Long_F",[2269.82,4073.35,48.7934],52.6999,1,0],["Land_BagFence_Long_F",[2212.68,4073.1,44.4349],228.782,1,0],["Land_BagBunker_Large_F",[2219.79,4068.09,44.9547],90.5962,1,0],["Land_BagFence_Long_F",[2278.78,4080.9,50.0111],229.76,1,0],["Land_HBarrierTower_F",[2253.77,4063.22,49.288],3.91843,1,0],["Land_HBarrierTower_F",[2285.27,4091.92,52.9933],273.756,1,0],["RDS_D30_CSAT",[2274.39,4074.88,50.3408],157.05,1,0],["Land_BagFence_Long_F",[2213.86,4070.49,44.2141],261.814,1,0],["
Land_BagFence_Long_F",[2224.86,4151.57,49.3103],14.2235,1,0],["Land_BagFence_Long_F",[2271.88,4071.36,48.8516],33.9534,1,0],["Land_HBarrierBig_F",[2256.75,4061.99,48.4588],12.1185,1,0],["Land_BagFence_Long_F",[2280.23,4078.45,49.98],249.158,1,0],["Land_BagFence_Long_F",[2222.01,4152.34,49.2227],14.2235,1,0],["Land_BagFence_Long_F",[2213.8,4067.55,44.3664],281.098,1,0],["Land_BagFence_Long_F",[2274.58,4070.46,49.0376],2.23802,1,0],["Land_HBarrierBig_F",[2246.96,4057.84,47.4322],146.576,1,0],["Land_BagFence_Long_F",[2280.62,4075.54,49.8754],278.293,1,0],["Land_BagFence_Long_F",[2219.3,4153.1,49.1196],14.2095,1,0],["Land_BagBunker_Tower_F",[2202.46,4075.7,46.4219],61.6359,1,0],["Land_BagFence_Long_F",[2277.35,4071.13,49.3262],333.198,1,0],["Land_BagBunker_Tower_F",[2223.02,4155.37,51.384],282.819,1,0],["Land_BagFence_Long_F",[2279.56,4072.92,49.6146],309.632,1,0],["Land_HBarrierTower_F",[2258.03,4156.84,53.6999],77.5328,1,0],["Land_BagFence_Long_F",[2212.66,4064.95,44.3793],310.303,1,0],["Land_HBarrierTower_F",[2278.32,4145,53.8437],274.349,1,0],["Land_BagFence_Long_F",[2217.78,4154.82,49.2901],102.768,1,0],["Land_HBarrierBig_F",[2264.97,4060.25,48.6569],14.7906,1,0],["RDS_D30_CSAT",[2207.14,4067.75,45.0589],189.145,1,0],["Land_BagFence_Long_F",[2202.65,4071.75,44.3109],114.163,1,0],["Land_BagFence_Long_F",[2210.34,4063.35,43.7436],341.679,1,0],["Land_HBarrierBig_F",[2240.11,4053.29,46.5177],146.697,1,0],["Land_BagFence_Long_F",[2218.39,4157.61,49.5022],102.768,1,0],["Land_BagFence_Long_F",[2202.18,4068.89,44.1063],84.6491,1,0],["Land_BagFence_Long_F",[2207.45,4063.01,43.7133],5.45652,1,0],["Land_BagFence_Long_F",[2202.86,4066.12,43.9013],66.1943,1,0],["Land_BagFence_Long_F",[2204.66,4063.9,43.7397],34.3143,1,0],["RDS_SPG9_CSAT",[2280.09,4151.19,55.3196],82.8832,1,0],["Land_HBarrierBig_F",[2272.98,4058.34,48.8162],14.7315,1,0],["Land_BagBunker_Tower_F",[2280.12,4152.97,54.7876],183.4,1,0],["Land_HBarrierBig_F",[2234.69,4047.56,46.1567],301.758,1,0],["RHS_Ural_MSV_01",[2207.9,4159.49,50.3304],31.5546,1,0],["Land_Bunker_F",[2225.87,4047.99,45.433],141.062,1,0],["Land_HBarrierTower_F",[2280.04,4056.62,50.1124],356.786,1,0],["ACE_Wheel",[2198.01,4155.51,149.761],31.5546,1,0],["Land_BagFence_Long_F",[2229.1,4172.49,51.118],298.875,1,0],["Land_BagFence_Long_F",[2224.15,4171.46,50.3949],42.4287,1,0],["Land_Bunker_F",[2245.97,4173.75,53.6627],89.6588,1,0],["Land_HBarrierBig_F",[2286.76,4058.78,49.9674],348.093,1,0],["Land_HBarrierTower_F",[2273.64,4166.9,55.4085],209.084,1,0],["Land_HBarrierTower_F",[2174.68,4097.13,46.9781],232.275,1,0],["Land_HBarrierBig_F",[2230.42,4040.59,46.1344],301.811,1,0],["RDS_ZU23_CSAT",[2225.23,4173.95,51.8918],344.633,1,0],["Land_BagFence_Long_F",[2229.58,4175.16,51.1848],259.031,1,0],["Land_BagFence_Long_F",[2222.83,4173.75,50.0586],78.863,1,0],["Land_Cargo_House_V1_F",[2200.06,4162.41,48.142],253.58,1,0],["Land_BagFence_Long_F",[2172.6,4116.94,45.8361],259.555,1,0],["Land_BagFence_Long_F",[2172.13,4114.26,45.7274],297.858,1,0],["Land_BagFence_Long_F",[2228.22,4177.43,50.895],215.65,1,0],["Land_HBarrierBig_F",[2294.89,4060.68,50.8224],348.078,1,0],["Land_Cargo_House_V1_F",[2208.99,4170.75,48.9538],0,1,0],["Land_BagFence_Long_F",[2223.31,4176.44,49.9527],121.939,1,0],["Land_Cargo_Patrol_V1_F",[2193.65,4160.22,51.9292],72.904,1,0],["Land_BagFence_Long_F",[2171.25,4119.2,45.9622],216.279,1,0],["Land_BagFence_Long_F",[2311.3,4125.57,53.587],69.1557,1,0],["Land_HBarrierBig_F",[2282.44,4167.27,54.7795],13.3522,1,0],["Land_BagFence_Long_F",[2225.61,4178.01,50.3771],166.662,1,0],["Land_HBarrierBig_F",[2269.87,4174.16,54.6455],49.5774,1,0],["Land_BagFence_Long_F",[2311.14,4128.23,53.6912],105.799,1,0],["RDS_DSHKM_CSAT",[2192.25,4161.04,52.9619],335.759,1,0],["Land_HBarrierBig_F",[2224.21,4036.94,46.1396],354.494,1,0],["RDS_ZU23_CSAT",[2169.22,4115.72,47.259],344.981,1,0],["Land_BagBunker_Small_F",[2197.85,4049.4,43.7698],208.315,1,0],["Land_BagFence_Long_F",[2168.65,4119.78,45.9663],165.682,1,0],["Land_BagFence_Long_F",[2312.74,4130.4,53.9806],147.274,1,0],["Land_HBarrierBig_F",[2302.29,4063.99,51.7144],325.654,1,0],["RDS_KORD_high_CSAT",[2313.75,4127.77,55.2142],346.253,1,0],["Land_BagFence_Long_F",[2167.17,4113.21,45.6394],42.4078,1,0],["Land_HBarrierBig_F",[2290.46,4165.54,54.9918],13.7658,1,0],["Land_HBarrierBig_F",[2264.37,4180.03,54.7449],49.2416,1,0],["Land_BagFence_Long_F",[2166.35,4118.22,45.8348],121.762,1,0],["Land_BagFence_Long_F",[2165.85,4115.51,45.7029],79.3346,1,0],["Land_HBarrierBig_F",[2318.67,4107.47,54.8881],318.552,1,0],["Land_BagFence_Long_F",[2315.47,4130.78,54.3389],191.252,1,0],["Land_HBarrierBig_F",[2309.04,4068.82,52.4316],325.609,1,0],["Land_HBarrierTower_F",[2318.21,4121.91,56.0829],274.37,1,0],["Land_BagBunker_Tower_F",[2215.47,4034.31,46.8181],270.345,1,0],["Land_BagFence_Long_F",[2317.76,4126.49,54.4699],285.556,1,0],["Land_BagBunker_Large_F",[2168.23,4134.55,47.7995],175.777,1,0],["Land_HBarrierTower_F",[2190.99,4048.21,44.895],26.7061,1,0],["Land_BagFence_Long_F",[2317.55,4129.11,54.545],242.822,1,0],["RDS_DSHkM_Mini_TriPod_CSAT",[2213.61,4034.12,48.6365],201.003,1,0],["Land_HBarrierBig_F",[2176.07,4064.14,44.5012],59.0405,1,0],["Land_HBarrierBig_F",[2171.48,4071.05,44.6994],58.6721,1,0],["Land_HBarrierBig_F",[2180.56,4057.32,44.2164],61.0385,1,0],["Land_HBarrierBig_F",[2321.03,4114.24,55.3095],269.491,1,0],["Land_BagBunker_Small_F",[2194.64,4043.63,44.0552],26.7652,1,0],["Land_HBarrierBig_F",[2207.39,4035.97,45.2321],26.8959,1,0],["Land_HBarrierTower_F",[2164.21,4089.43,46.5162],52.5354,1,0],["Land_HBarrierBig_F",[2298.52,4163.9,55.0722],15.6435,1,0],["Land_HBarrierBig_F",[2258.78,4186.05,54.2559],51.8773,1,0],["Land_HBarrierBig_F",[2199.85,4039.48,44.726],26.571,1,0],["Land_HBarrierBig_F",[2167.17,4078.28,44.9273],65.3708,1,0],["Land_HBarrierBig_F",[2184.85,4050.23,43.7708],61.4466,1,0],["Land_HBarrierBig_F",[2315.66,4074.1,53.0375],135.438,1,0],["Land_HBarrierBig_F",[2163.35,4085.67,45.2571],64.8055,1,0],["Land_HBarrierBig_F",[2243.78,4189.4,52.7701],182.016,1,0],["Land_HBarrierBig_F",[2235.64,4189.26,51.874],185.001,1,0],["Land_HBarrierBig_F",[2252.16,4189.4,53.479],181.027,1,0],["Land_HBarrierBig_F",[2321.22,4129.4,55.7974],274.883,1,0],["Land_HBarrierBig_F",[2159.81,4095.23,45.6686],242.005,1,0],["Land_HBarrierBig_F",[2227.43,4189.45,50.7219],186.028,1,0],["Land_HBarrierBig_F",[2324.49,4100.29,55.4334],137.741,1,0],["Land_HBarrierBig_F",[2306.42,4161.98,55.1163],15.9692,1,0],["Land_HBarrierBig_F",[2321.58,4080,53.6956],135.32,1,0],["Land_HBarrierBig_F",[2207.77,4185.29,49.3269],155.95,1,0],["Land_HBarrierBig_F",[2200.48,4181.74,48.9916],158.832,1,0],["Land_HBarrierBig_F",[2210.17,4186.48,49.2838],155.078,1,0],["Land_BagBunker_Tower_F",[2218.14,4189.68,50.6078],76.9627,1,0],["Land_HBarrierBig_F",[2321.62,4138.02,55.9008],275.156,1,0],["Land_HBarrierBig_F",[2192.91,4178.73,48.7391],159.478,1,0],["Land_HBarrierBig_F",[2179.94,4168.81,48.6926],140.588,1,0],["Land_HBarrierBig_F",[2185.99,4174.43,48.6585],139.596,1,0],["Land_BagBunker_Tower_F",[2154.87,4102.68,46.8555],299.839,1,0],["Land_HBarrierBig_F",[2173.74,4163.48,49.1266],141.859,1,0],["Land_HBarrierBig_F",[2313.61,4158.86,55.1133],34.6891,1,0],["Land_HBarrierBig_F",[2327.65,4086.07,54.6054],135.319,1,0],["RDS_DSHkM_Mini_TriPod_CSAT",[2152.93,4103.05,48.6749],243.84,1,0],["Land_HBarrierBig_F",[2330.56,4098.99,55.9311],37.4267,1,0],["Land_HBarrierBig_F",[2167.19,4158.33,49.4117],142.852,1,0],["Land_HBarrierBig_F",[2159.2,4144.82,49.0502],113.974,1,0],["Land_HBarrierBig_F",[2324.29,4145.51,55.8168],131.112,1,0],["Land_HBarrierBig_F",[2155.81,4137.29,48.1265],112.11,1,0],["Land_HBarrierBig_F",[2162.37,4152.52,49.4371],111.659,1,0],["Land_BagBunker_Tower_F",[2151.47,4121.1,47.5355],16.6187,1,0],["Land_HBarrierBig_F",[2320.42,4154.46,55.3173],35.0029,1,0],["Land_HBarrierBig_F",[2152.8,4129.51,46.9495],114.564,1,0],["Land_HBarrierBig_F",[2332.72,4092.45,55.5329],121.813,1,0],["Land_HBarrier_3_F",[2148.95,4105.3,45.3988],225.832,1,0],["Land_HBarrier_5_F",[2147.71,4109.04,45.5576],262.806,1,0],["Land_HBarrier_5_F",[2147.56,4114.42,45.756],276.398,1,0],["Land_HBarrierBig_F",[2327.29,4150.16,55.7717],37.0752,1,0],["Land_HBarrierBig_F",[2337.16,4099.78,56.4843],121.85,1,0],["Land_HBarrierTower_F",[2340.94,4106.45,58.2214],286.422,1,0],["Land_HBarrierBig_F",[2334.11,4145.44,56.3866],37.5878,1,0],["Land_BagBunker_Small_F",[2338.48,4133.12,56.9801],4.68664,1,0],["Land_HBarrierBig_F",[2340.89,4140.65,57.0184],37.5519,1,0],["Land_HBarrierTower_F",[2342.39,4136.19,58.2636],273.756,1,0],[2241.78,4107.77,46.443],[1]]
You should be able to copy and paste the above into the paste function.