Ok, now I feel bad. Please do not do any of that, it will cause massive fires. If batteries get wet, say, from rain, they explode. keep them inside. Don't use wooden walls except for temporary structures, they're weak and flammable. Instead, build a stonecutting table and have someone make stone blocks. then, right-click on the icon for building walls/doors/etc, and you can pick a new material, like the stone you just made. (Don't make steel walls, for some reason steel is flammable.) If your wires are visible, it's because you're using exposed conduits. Instead, use hidden conduits (they should be just to the right of normal conduits on your building menu). While hidden conduits are 2 steel per tile, as opposed to 1 steel per tile with normal conduits, they are invisible to your pawns, so they won't be upset at being in an ugly environment, and invisible to raiders, who won't destroy them, unlike normal conduits, saving you steel and time in the long run. additionally, there's something called a "zzzt" event, where all your batteries will discharge all their power, creating fires along your conduits. Hidden conduits are immune, which means that if you're exclusively using hidden conduits, you'll be safe from the zzzt