Well, hopefully it's the servo. If you need the switch, HW sells them. Not sure how they're supposed to be terminated, but I would cut and resolder the wires outside the switch most likely. Again, I'm not sure what the connections look like inside the modern HW push button switches. Maybe there's tabs inside, though I have doubts due to how compact the housings are. Most likely wires soldered to a PCB.
Good luck brother.
Good luck brother.
