[Pazuzu]

I did a quicky look around the parts section here, but didn't see anything like the wiring harness to show you.

You might make a new thread (unless you can change the title to this one), asking about the interior wiring harness connection, or bulkhead connections, or under dash connections, something like that. There's plenty of people here who have put together what you're working on, but they might not notice a thread about under dash relays, since those don't exist.