I put my gaskets on the underside of the pivot (inside the car) before pushing it through the cowl hole, then the chrome cover and the nut.

I remember the nut was very soft metal and easy to distort with a wrench. Don't over-tighten. Not holding much anyway.

I think I also put a tiny bit of the 3M rope calk under the chrome bezel... my thought was to save and cushion the paint.

Two man job or use a shoelace to pull pivot up through the hole and get that nut and bezel on.