I need help Identifying a couple wires.

OK if you are doing the MAD bypass, you should also connect the red, as this puts the red and black in parallel, and they both together become your new battery feed. Since the ammeter is now bypassed with a new wire under the hood, this means that ONLY power TO the interior is going through those two, not charging current, so this somewhat relieves the strain on the two bulkhead terminals.

By the way, even "Ma" knew these were a problem back then. If you can find documentation in some of the shop manuals for "fleet wiring" (police, commercial, taxies) and hi- out alternators, they modified the wiring by running larger conductors through separate bulkhead grommets.