A colleague need this windows to mount his MMU2S on his prusabox, I made these models using my acrylic windows as a sample.

Made left version with and without window for MMU2S data/power cables, the version with window cant be removed without disassemble the MMU2S unit.

Print in PETG (at least)

Also you may need to extension cable adapter for the two motors that are far away from the electronics board.