This model is a replacement for the drawer of an Ender 3 S1. A BTT or a Raspberry Pi can be mounted in the drawer. Ethernet and USB ports are accessible from the front. A small cutout in the front can be used to route the power cord to the Pi.
The author remixed this model.
I added a pattern on the bottom of the drawer to save material when printing, a hole on the back to power the BTT PI directly from the printer source since it needs 12-24V and I modified the fixing of one of the holes to fit with the BTT Pi , however you can fit an RPi4 using the other 3 holes.