It seems like the updated version of the MOS'Light board from Arnoz L'Atelier (version 2.2) doesn't fit the available mounting brackets.
Board available here:
https://shop.arnoz.com/en/dude-s-cab/57-mos-light-v22.html
Two versions available here depending on whether you want to see the mounting screws or not.
Board mounts with M3x8mm screws.