One wire alternator nonsense

73 Duster. Going to a one wire alternator. Started digging into the wiring and found this:
1F4224D7-F9E1-473B-BB5E-FB11D0ADDDD4.jpeg 1F4224D7-F9E1-473B-BB5E-FB11D0ADDDD4.jpeg Sorry for the double picture. You can see some whiz bang in gym shorts hacked into that plug. AFAICT, the only wire I need out of that mess is the yellow one that goes to the coil. I can’t find in the wiring diagram what the rest of the stuff is, except for the two field wires and the main alternator wire.

682667BB-266C-4335-8F07-6D4B44B02F56.jpeg That’s the plug. Can I eliminate it?

ADE0C7C7-77A3-4F13-949F-BBA488720983.jpeg The yellow wire nut is on the main wire from the alternator. That wire was BAD.

So...I need to know what to do with that plug, as in can I just eliminate it, or do I need to keep it? Also, I’m looking at the Mad electrical web page and they drill into the bulk head, but I can’t tell where I’d drill on this 73 bulkhead.

Any help is much appreciated.

YR