Young grasshopper is seeking answers and I will do my best to enlighten. 😉
Your remote electric heater valve is the same unit I previously had installed on 2511. It was an upgrade that went through the community maybe 10 years ago. The photograph is of my unit which is now removed. As you will notice the control knob is exactly the same as the control knob on your console, located to the right of your radio.
Now for the rocker switch on your console that you thought was for the heater valve. It is in the same location as the original rheostat that controlled the gauge lighting and I suspect it replaces that rheostat with a simple on-off switch. Easy to check this evening in a dark garage.
Now on to the two devices at the left hand bottom of your dash, near the steering column.
The knurled knob is the trip odometer reset knob. Twisting it will return your trip odometer back to zero.
The toggle switch is definitely another non-original switch, and on this one anybody’s guess is as good as mine.
You’re welcome. 😉
Larry