Alternator wiring issues

The field wires, and output wire were originally hooked up something like this.
upload_2019-9-16_22-7-45.png

Alternatively you could run the output wire like the '73 60 amp alternator cars were done. I've posted that here before so a search will turn that up.
The wires in your hand you'll have to look up in a '72 FSM and/or '72 Master Tech booklets at the Imperial Club or Mymopar.