Hi guys: I'm upgrading my interior with underdash courtesy lights and have a dumb question--how do they hook up? I bought a repro harness with the wiring and sockets and have the repro socket brackets and loom installed. Now--where does the thing plug in? The repro harness has a male plug made onto it, but for the life of me I cannot find the factory female plug in the car's harness. Is there a factory female plug already up under the dash? If there isn't, how do I wire the new harness in? I know they work on a weird ground principle and would appreciate any advice. Thanks a lot!