sorry i just realized how the setup is one.

are the switches NO or NC?

i would try to wire them in parallel and use M558 P5

they will need to be connected to the z probe port.

but a construct would allow the printhead to move. this would not be beneficial for the print quality.

@Veti I just tried this but now I can't control my Y axis. Would you be so kind as to tell me what g-code I can send to undo this? Thank you!

That got it working! Thanks for the suggestion.

BTW: flashing the firmware with BOSSA on a Mac worked without a hitch.

I've taken the liberty of marking this as solved, as the original title doesn't reflect the recent posts.

Signal strength of -73dBm is marginal for the WiFi module. Please see https://duet3d.dozuki.com/Wiki/WiFi_disconnections_and_AJAX_timeout_errors.