FGD211 Fibaro Dimmer Wiring for LED Lights with Staircase/Cross Switches Setup

Hello
I have purchased a FIBARO kit complete with FGD211 dimmer.
The places where I would like to use it, LED lights, are connected on stair/cross switches.
Unfortunately I've been sitting on this for a month now and still have no idea how to connect it.



i have a junction box with N near the first staircase, so I have a cable to connect to the module, but no matter how I try, the light does not turn on or off.
Could one of you professionals help me with this ?
Thank you

Take pictures.

Try this

Thank you for the diagram but such a connection is not possible in my case.
I enclose the exact wiring diagram as it is in my case.