[moltuae]

I can't really tell the dimensions from the photo, but that metal bracket looks to be too thick. You need something thick enough to be rigid and hold the lens in place but thin enough to slide down the (inside) back of the lens.

If I remember correctly, the steel I used was from a computer expansion port blanking plate, which was not much thicker than that from a tin can -- in fact a piece of tin can steel might do it. What I did was cut the steel into a rectangle, the full (internal) width of the lens then slid it down the back. I then marked where it needed to bend at the top of the lens and bent it to the required angle (which is probably something like 100-120 degrees) to make the overhang parallel with the top of the lens. Then I just cut the overhang down such that it protruded like a single (full-width) tab. After a test fit (with the glove box out of the car), I glued the bracket to the lens. I'll take a photo sometime when I get chance (my S8 is in storage these days, several miles away).