I needed more space to route the cables into the Original Prusa Enclosure, in my case the USB cable for Octoprint and the cables for the LEDs that are controlled by “WS281x LED Status”, an Octoprint plugin. Why wait for the announced “Smart Box” to control smart LEDs, right? :-) So I used a modifier part “Generic box” in PrusaSlicer as a “Negative volume” to cut a larger hole. I have added the model as an stl and as a 3mf with the “Generic box”, in case you want to modify the dimensions. I also used one of the modified foot brackets in the front on the left side to route the cables for the Original LED Strip and the Filter Addon to the Basic Board.
The author remixed this model.