On March 1, 2022 Colyn Firth in South Yorkshire, UK wrote:
"My mechanical switch has a built-in swivel which is perfect for where I mounted it onto the outer casing of the steering column, down by the pedals. I pop-riveted two jubilee clips to the base plate of the switch which I clamped onto the steering column, I used some very thin rubber around the column to protect the paint on it.

The pull spring on the switch attaches to the brake pedal and I made a clamp to fit to the pedal arm because, for safety reasons, I didn't like the idea of drilling a hole in such a structurally important brake component. Everything about this switch just clamps into place and no extra holes are drilled anywhere". -- Colyn
You can push the button on front end, or pull the spring on the rear end, as it is the same rod through the switch.