I bought a "project" NA8 a few weeks ago, nearly every single part of the car was taken off an dismantled (I have no idea why

Then it was all just shoved into boxes.
Drivers side:
I am trying to put the mirrors back together, and I can't figure out how to compress the internal spring so the little teeth on the washer can lock into place on the mirror stalk.
How do i get the spring locked down?
Passenger side:
This side is complete, however I can't seem to rotate the mirror on the base, as i need to expose the holes so i can screw it into the door.
How do I rotate it?
I have searched and cant find what I need, can anyone help?

