Stop in for a cup of coffee
as said, I'm sure Klingers has everything to get it back to stock wiring at least. Do you think it started from the bulkhead? I know that is a common trouble spot. I got my headlights off it with relays, but have not done anything about the rest of the load going through to the amp gauge. Although, the connectors showed no issue on mine. I did have them apart, cleaned and put back with dielectric grease.