thanks Mssr. Bwatoe
but I am not getting where this brass spring is located. I've got these big "ham hands" and it is a very tight fit for me to get hand and fingers up behind switch.
In your photo above, is the photo of the switch as it is oriented behind dash?
what I can see of mine,, the screw terminals face upward, not sideways.
In photo, in lower left, I see the brass external threaded fitting (which the chrome bezel screws onto), and I'm guessing that the knurled brass piece is behind the dash.
the other brass piece in your photo is attached to the switch "box" and I see where the rod would enter. Is this what is squeezed?