Your switch panel is out of a later year E-Body, but that doesn't matter here. This is the back of a switch panel with a variable speed wiper switch.
Mike
Thanx -
How can you tell the year...
I got the pic. from a sales tread in here...
About the heater.. I got the idea that I could take out only the part inside the white line..
If not, -
I see Only tree screws holding it in the dash..
How do I get to the one in the top..