Can anyone help me identify the use and proper mounting of a small (approx 1 1/2" x 1 3/4"), bare steel bracket with a short screw hole in the middle and larger, apparently unused hole towards one end, that is found on the forward end of the inner door frame on a `69 with deluxe interior. Took both door panels off in preparation for some body work and one of these was tightly screwed to the right door whereas the other was held by its screw but only loosely on the left door. The bracket has two small slits in it,forming slightly bent 'tangs' that I would guess are supposed to sit on the top edge of the inner door frame, but neither was attached that way