Hi Tom, welcome to your early on and advancing condition of aluminitus, a life changing endeavor. I take it you do not have the interior walls indicating the placement of outlets. Also, I'm assuming the wiring has been taken out. If you are going to go "original" with the interior latout, then I can see that you will need a way to figure placement of outlets. If not, you won't need a schematic, as you will want to place your outlets at different locations depending on your new interior layout. The actual wiring and panel box is installed just as any other electrical system. I wired mine for a concession trailer: Member's Photos - Photo Gallery
. Sorry, I don't have the schematic you are looking for.
"55 Flying Cloud