I've battled this problem a lot. You can adjust the switch position, it should be NC when machine is off, and when you brake it should be NO.
I would advise to
1) get a looong torx to release adjustments screws, push the switch towards brake stock until you get NO from pins. Then go back just a bit so it would be very sharply set. You can remove some brake linkage to free up space for that kind of work. But I've done without.
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