I removed an old light-switch and the following appeared:
I went to Brico, showed them the old switch, and got the one below.
I am wondering a bit how to connect it. I am a bit worried that I only see 2 metal screws. (2 lower right ones)
(It is quite certainly not 3-phase, but perhaps ground)
(Probably basic, but is there some way I can measure if something is ground or not)