Help adding an emergency stop button on Matek H743

I’m trying to add an emergency stop button to Matek H743 on one of the servo port. I see you can change a servo port to like S10 to use GPIO by setting Set BTN_ENABLE = 1 and SERVO_X_FUNCTION = -1.
That is where it get confusing. All I want to do a wire a push button switch that has (NC NO C) to it. When I press the button, it will stop the servo motors. Any help would be great.


AFAIK the standard way of implementing emergency stop is to kill power supply to the actuators.

I was looking at the following pages below but I’m looking for guidance from someone who might have done it before. I really want hook up a button an emergency kill switch and possible try to get a encoder so I can select different flight modes.