I drilled three holes to the can. Two holes on each side (measure carefully) to attach the mirror frame with two bolts. When you take the mirror frame apart to remove the original mirror you have to remove two short bolts. Use two longer bolts in their place to attach the the mirror frame to the tin can. So, the bolt goes through the mirror frame hole and then through the drilled hole in the tin can. I used nuts at the end of the bolts to secure them.

The third hole I drilled was used to prevent the frame from moving back and forth around the tin can. I drilled a hole between the other two drilled holes and attached a short bolt and two nuts in it. Like this: bolt, nut, through the drilled hole, nut. The mirror frame is going to be on top of this bolt, not attached to it. This is not necessary, but it makes the frame stay better in the right place, because the bolt acts as a “stopper”. When assembled together, this third hole with the bolt and the nuts will be on the underside of the tin can so it’s not even that visible. Hope this helps and you understand my long and confusing explanation.. I think I should take more “in the process”-photos Would make this explaining easier!