simple filament sensor switch

[Co3get]

I need to make a simple microswitch runout sensor:
https://duet3d.dozuki.com/Wiki/Gcode#Section_M591_Configure_filament_sensing

It seems to be doable but light on details.

1. I'm wondering how do I configure what happens when the switch is triggered? I'd like a basic pause, retract, and hotend cool.

2. Also, It's a bit unclear how to tell duet how to know where the sensor is plugged into.

#) Switch wiring: I'm assuming stop and ground, no need for the voltage. Right?

My idea is to have a switch wired like A below.

[Co3get]

This post is deleted!