Well, these first two holes I can cover up with a casing quite nicely, but a third one in that small old built in closet is gonna start looking pretty suspicious...So Ill have to do it on the opposite wall, which leads into a 10" gap between the closet wall and the bathroom wall.
But its the last hole I dare make I think, so I really need to know where to punch it, what height etc. Do you have fans in all the openings in your diagram?

Btw, thanks so much for taking the time