65 Dart Alternator Not Charging
It's in the above photo, there's one terminal bracket with a brush that is inside the plastic insulator, and one that is mounted outside with the brush exposed. I'm assuming now that was just a spare since it would be doing nothing.
This is my field terminal insulator without the "spare".

Now that I've taken it apart I'm better understanding it. I will run those tests mentioned above and see what comes of it.