How to connect Duet 3D 6HC / Raspberry 4 with Raspberry 7" Touchscreen.
Help with wiring

I plan do add a syringe extruder. Which will work via ordinary NEMA17. I need to add an end-stop sensor to stop the extruder motor when the plunger of the syringe will reach the bottom. Maybe the same connection for the filament runout sensor for an ordinary 3D printer will work?
I wonder, where I should connect it and which modification I should implement on firmware.

I am developing a machine, which will have additional electronic parts like bigger fans, led light and syringe extruder. I need to connect end-stop sensors to the extruder motors, please help