I actually have the Factory Service Manual (FSM) wiring diagram and loom layout info - I'm having a little trouble as this is a custom loom by Kev Rowley so it doesn't match up to the standard loom(s).

If someone else has a Kev Rowley loom - or knows these looms backwards - they might be able to help me ID the mystery plugs.

That's dattodudes website in the web links by the way....his site is pretty cool.