My EXP isn't attached to anything. For the rack/gallery lights you're going to have to trace the wiring, start with the lights themselves, mine connect inside the trailer towards the the opening on the side opposite to the water heater, there are also connection point above the mudflaps. Mine came with a wiring diagram, so you might want to look for that, mine's a 2011 and I have the same switches and distribution block. But I would first check all the fuses and see if they need to be replaced or not, while you have the cover off, make sure the connectors are screwed tightly down and not corroded, then I'd do the tracing from the lights down the wiring to the where they are connected on the trailer.