I think I figured most of it out. The mirror cable goes through the large hole on the type1 door towards front of car (using the remote mirror which is round and has the cable towards the front of the car) is what you want. The thing that is not obvious (at least to me) is the 2 prong bracket then goes ON TOP of the mirror gasket, and that is why the bracket has that odd depression on the bottom (isnt flat) because that depression goes directly over the gasket cross section and pushes on top of that to stay firm to the car. One long Screw then lines up through the mirror, center bracket hole into the center screw hole on the car. Now the tricky part is I think the offset hole in the bracket gets screwed up from inside the door as the bracket hole is threaded, and the door hole is the size of a small Tylenol capsule so a screw cant thread into that.
Well I'll get it together tomorrow and I'll see if that is stable. Whew - hope so
1968 Fbird Conv - Well its mostly there. 8) - mine 2015 1979 Camaro RS - Summer DD - mine 2013 Now where did I put my flashlight? ;(