The two screws in this photo attach the cover to the base.

There are 2 "bushing" holders on the left side and an opening for a bushing on the right side - I think the original bushings were pieces of rubber with a washer on the top of the rubber.

3 screws are used to go through the three opening/bushings.

bushings like the ones in figures 5 & 6

I had a hard time finding those rubber bushings a few years ago. I'll see if I can find a source.