The engine is a '76. I watched a video showing me that I needed to put nylon screws on the "brushes" plural I meant to say.. telling me that they do not need to be grounded out using this rec/reg.
I don't know what video you watched, but you don't use nylon screws with the #24-2089 rec/reg that you show. The 3 nylon screws should be removed, and put back the original 3 steel screws. Those 3 terminals are to be grounded to the stator frame.
The only time you would use the nylon screws, is if you are using an 80 to 83 type rec/reg with a 70 to 79 type alternator.