Did you fix the white and yellow wires from the alternator to the VR plug?
Have you taken a reading from the alternator while it's idling? If so, what's the voltage?

if you ran that 8ga wire from the alt. to the starter, and those 2 wires on the T-plug are good and functioning, then it should be charging. If it isn't, then the alternator is now in question.
Squealing is typical of a low battery and the alternator tightening while charging at higher voltages.
Charge the battery completely before testing the alternator at idle. This will tll you if the low battery was the issue.

 

5 hours ago, Patcon said:

It is my understanding, the more current you pull the harder they are to turn...

That is exactly the case. There's no such thing as a free lunch.

Well I found the squeak origin. The belt was loose