I put my outlet a little lower without removing any panels. I went lower just for that reason, it works fine. I too went to the battery and fused it. It is grounded right near the receptacle. I purchased the outlet at a marine supply store.
Dave IBQ, you may want to take the extra stuff off of your key, mine scratched the black plastic. BYW, does anyone know a treatment for the black plastic, it is scratched from my key & buttons on my jacket.
Richard L.