Hi, I have a 95 skyline 860 truck camper and are converting the manual jacks to electric, looks pretty straight foward except for the wiring, the camper is pre wired for jacks, it has a socket at either corner with red and black wires but I can't find where they go to in the camper, all info says under sink or near battery's but I can't find anything that looks like them without pulling sink or water heater out, does anyone know where they'd be hidden or any ideas?