I've had good success adding various utility and ventilation feed throughs in rentals with sliding glass door inserts, including large ducts for various HVAC experiments.

I start with a board and cut/slot it so it fits neatly into the top and bottom tracks, then I move the latch receiver to the board, zip a few screws through the board where the holes won't be noticed.

The glass door opening becomes a bit narrower, and I can cut as many holes as I want in that little bit of wall.

If it's painted white it usually ends up looking better than most of the corporate maintenance work on the building.