1966 dart problems, help

Opps typo I meant to say 17 volts. The black heavy wire does indeed go to the termial block. The green wire seems like it does not want to fit on to the terminal at the back of the alternator. Maybe it does have a piece broke off inside it like you said. I will check it out tonight. I have had the car for approx. 6 months now and have never had an issue with it. It is actually my daily driver. With that said wouldn't it have overcharged the battery long before now if the green wire was not hooked up?

The thing I hate the most is trying to figure out what the previous owner has altered/changed on the car. Do you have a picture of what the original voltage regulator looks like? Thanks for all your help it has been greatly appreciated.