Before you cut out the pieces, you will need to trace on a couple of tabs, shown in figure 4.
These tabs are what you will fold over, and rivet to the top part of the reflector. Simply put, they are 1 inch square, at a 90 degree angle from the 4.5â? edge, and they start an inch from the corner. The black dots on the tabs represent a hole drilled through the center. Use the appropriate sized drill bit to match the rivets you will be using. Draw these tabs onto the plates you have already sketched out, drill the holes, and cut out the two plates. Once you have cut both side plates out, use the pliers to fold all 4 tabs at 90 degrees.