Another alternator problem

I don't know these. It appears the brush terminal with recessed spade is just clamped to the case as in 1960's Mopar alternators. The other brush terminal with green wire probably goes to a Vreg they install inside the case, though would have to be pretty small to fit. It must sense voltage on the output stud. Good you jumpered the case to BAT- since that was the problem in a rebuilt alternator I once put in my 1969 Dart (not a good ground connection to body), which I solved in the auto store parking lot. Personally, I would rather have an external Vreg since easier to diagnose problems. In my 1965 Dart, I installed one on the inner fender right next to the alternator so easier to follow the wiring.