The mount prints in 3 different parts,
Main body - Needs to be printed with support. There is a 1mm keeper channel on the top part of the main body this will need support, also the horizontal screw section located on the back side of the main body that will require support. The embedded screw channel is hollow to the other side so getting the support out is a breeze.
Camera mount - When you go to add your support make sure to add a little support under the hinge curves it really just helps keep the hinge portion round. it can be printed with out those little extra supports.
Mount connection - Could be printed with the same little hinge supports
As you can see by the photos it installs under the print bed glass. it fits snugly also allows some side to side movement of the mount body.
Once you get everything printed i used 2x 4-40x1/2" screws and 2 x washers that fit (sorry we didn't have metric where i live how ever the measurements are 2.7mm from thread to thread and 12 mm long) to attach the Mount connection to the Main body. They thread directly into the ABS.
To attach the Camera Mount to the Mount connection i used 2x 6/32 (3.37mm T2T x 12mm long with 2x washers to fit.
One other thing to note, once you get this printed and installed, i took the camera apart to adjust the focal point to be directly on the prints rather than the back of the enclosure. you can learn how to do this procedure here ( https://www.youtube.com/watch?v=v-gYgBeiOVI )
i also use an elastic to hold the camera in, every iteration that i used to hold it in before failed. Also allows easy access to the camera if need be.
As you can see by the camera view you can clearly see the 2 screwdrivers i used to mark the back corners of the build plate.