it's a bulkhead connector. FIND THE DEAD SHORT FIRST!!! OR YOU COULD DO THIS AGAIN AND AGAIN AND AGAIN. Are you running a high output alternator with a 40 year old stock wiring harness? This could be your root problem.
One of the reasons I plan to just rewire the whole engine compartment. Other reasons being old shitty wires and a mess of electrical tape. The alternator is 60a.
Evans looks waaaay cheap compared to other harnesses I've seen out there.
The locator pin is a the critical piece that he will ask about. you pic shows a center locator and if you look at the others on the bulkhead connector you'll notice they are in different locations
