I had pics of it on my Milano, but looked everywhere and can't find them. I sold the car a couple years ago.
The ridge on the rubber pad fits in the groove in the roof. The plastic rubbery coated clamp goes between the door and roof to hold it on and tighten it down. Sorry I can't find the pics with it mounted on the car.
Red 1991 164S, Black 1991 164S, Red 1987 Milano, 1972 Berlina, 1973 Berlina rebuilding SPICA engine