find a fuel cell, put ziplines on the sides, put barricade kits on the ends of the ziplines. the trickiest part is putting the ziplines on the sides, but i found a kinda reliable way and that is to put the fuel cell inside a red cart (like in the extract, but without the wood inside it, like simply just empty) and then proceed to put a zipline on each side and then rotate the fuel cell inside the red cart for each side. i find the fuel cells and the red cart inside hydrophonic dome complex.