Hi Guys

I have a mill i'm rewiring to a modern motion control board.

I'm just trying to create the wiring diagram before I take it all a part, though ive hit a snag wire the tool zero sensor.

It seems to be a magentic sensor that reads the movement of a metal anvil as it slides across the micro chip as the tool hits the arm.

Does anyone have any idea what the wiring on the pcb would be?