65 Barracuda - No Charge from Alternator

The photo I uploaded is of the alternator off of my Barracuda. I just took it and got it tested and it tested just fine, but when I have it installed on the car I get 12.2V at the battery and it just slowly goes down as the car is running longer. I currently have two wires coming off the alternator one goes directly to the battery (mounted in trunk) and the second ones goes from the male terminal to the volt regulator. I was really hoping the alternator was bad so I could just quickly swap it out and be done, but nope.

Do I need to run a ground wire from the terminal circled in red ?
should I run new wires from alternator to volt regulator and so on ?
I currently do not have a ballast resistor on the car, but would that really affect the alternator charging ?
All help is wanted, nothing is really stock 65 barracuda anymore, MSD Distributor, MSD Box, MSD coil

Barracuda Alternator .jpg