Cold Start valve thermo switch terminals
 

According to my wiring diag, the two terminals on the thermo switch are different and need to be wired the right way. One supposedly has a W on it. My terminals are two round flathead pins, and I cant find any markings. Am I looking at the right thing/place?
Alan

The terminal that protrudes toward the rear bumper the most has the red wire connected to it. The other has the yellow.
If you look closely the round discs are different diameter but not by very much.

So, with the discs different diameter, there is only one way?
Thanks
Alan

If the terminals have not been changed they will only go on one way.