Bob, like you I have gone thru my wiring systems. On the H3 and new XL's we have the battery box on the curb side. Don't you have the Vanner and batteries in a contained cabinet? Behind your drivers tag you should have your secondary electrical for your trans and A/C? I guess the question is? Was it the PRevost system that failed or your HOUSE charging system. From what I have seen, it is the curb side frame rail that takes the high amperage DC cables. Once inside the cabinets they are routed in PVC conduit to the front of the bus.