Fibaro Dimmer 2 Install help

I am hoping to add a dimmer 2 to my en-suit which also has a ceiling fan with isolator but comes on when the light is on. So im hoping i could control both from the dimmer as well as dim the lights ( x3 led Gu10s) .

I noticed that there were neutrals which being a new house i wasn’t expecting to see ( rest of the house is philips hue) However i plan on using the feature with the dimmer 2 looping the n- sx.

My question is there were x3 cables in com and x2 in L1 on the light switch am i right in thinking i should put x3 into the normal places you would with the dimmer 2?

cant replace the back box so im hoping an extra 10mm will do by adding this