Guage cluster help

[M Evertsen]

Ok, I am having a little difficulty here. I am taking the guage cluster off my 69 so that I can get to the underdash wiring a little easier. The previous owner made quite a mess of some of the wiring, and I have nothing electrical in my truck beyond the wipers.

The problem I am having is that I cannot get the knob for the lights off to get the gauge cluster off. I got the knob for the wipers, as there is a little keep screw on it. The light knob does not have that keeper screw. There is a little slot on the back of the knob that looks like there should be a tab or something holding the knob onto the shaft, but I can't get anything to work.

Any help would be great!

Thanks,

Marcial