Ormerod X endstop

Hello guys,
I worked some time ago on an Ormerod and didn't touch it since 2 months and I've got a problem with the X-end stop. I don't find the x endstop Reprap gave me, so I wanted to add a switch (KW11-2) and wire it on the duet. The switch is in the red square of the "X endstop ormerod" file.

I tried to wire it on the Duet like in the "X endstop electronics"
.

It doesn't work at all. The LED on the Duet is ON when the switch is not pushed and is OFF when it is pushed. How can I do ?

Thanks

I don't have a Duet, but I think that is normal. The LED indicating that the signal line is shorted to ground when the switch is untriggered/carriage is away from the endstop, and pulled up (light off) when the switch is triggered. See [github.com] and [reprappro.com] portion about the lights on the board for the description of the normal operation of the Y-endstop light.

I like that the light is on in the untriggered/NC state and toggles to off when the stop is triggered/opened.