Quote Originally Posted by Jonathan View Post
Is the idea for the mirror to attach directly to that little black square? (using one of those sticky pads/ or some 3M tape). Reason I ask is I have my mirror off at the moment and that square is very smooth on my car. So smooth I started to wonder if the adhesive would stick to it or not, like maybe I was missing some additional layer of something?
You did not miss anything. You're on the right track. It is attached using a thin, high strength double-sided adhesive foam pad.

Buy one of these, then carefully apply one side of the adhesive pad to the black patch after cleaning the black patch with alcohol. Clean the mirror mount base with alcohol and press it onto the adhesive pad.