[JayBar]

I hate to drill holes in anything so I used double side tape, the good kind that you put chrome onto the body with.

I got two stainless steel washers as big as would fit. then mounted the mirror to them, using a flat head screw up from the bottom and an acron nut on top. The washer provided enough surface for the tape to work. Been on for two years so far.
And if a kid pulls on it and makes is loose just re-tape.