I only asked because thats what I was thinking.
When I still had the 44RE I just had the switch. As I said it just needs to be a momentary switch to give that ground signal to either turn ON or turn OFF the O/D. The Black switch was the momentary switch and the Red switch was to turn the electric fan off.
Then I'd swapped the switches out when I was doing some other work to the Jeep and used a toggle momentary switch for the O/D.
But honestly I liked what I'd done when I installed the GenRight center console and had the ON & OFF light to tell me when I'd turned the O/D off. Not that you don't know this but if you're going slower it was just a way to remind me.