On my X738, I got sick of using the button as I would occasionally miss it and then it would kill the PTO. PITA. And at my place I do a ton of K-turns, so this was a constant headache.
Mine has 2 methods to override the reverse safety. You either pull up on the PTO button/switch on the right side, or you can push the yellow plunger (button) on the left side.
The yellow plunger will just pull right out of the dash with a flat blade to pry gently and then I wired a jumper across the 2 terminals, leaving the connector in place. If I ever find a need to bring it to a dealer, I just need to pop the switch back out and pull the jumper so they don't try to "fix the broken safety" for me... Made life a whole lot better!