Uses standard screws for the countersunk mounting holes. IIRC, they are supposed to be M4 screws - they measure out to 3.9mm. Supports a permament installation of the drive via a M2 socket screw at the back. The hole for the USB-C was intended for the original cable that came with this drive, but it's a bit too big so I hot-glued mine into place. To reduce the tack from the hot glue which will stick to the enclosure, I put some regular scotch tape (gift wrap tape) on top. Works great and now the drive slides out with ease!

The mount is pretty tight on the drive so either print it 1-2% larger, or, insert the drive and while holding the sides of the mount tight with tape, make a template by marking the hole locations on some strips of tape and then transfer that to your desk for drilling. Eye-balling it didn't work for me the first time around.

Seen printed here in PETG on a modified Ender 3. Supports will probably be required unless your printer can do proper bridging; mine doesn't so I used supports even located on the model.