1. the pad is glued not screwed.
2. the switch should be mounted to the brake pedal pedestal, just above the brake pedal. You'll have to remove the driver's side under dash to gain access, should be threaded into the pedestal and retained with a lock nut.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.