I remixed Dizzee78's Raspberry Pi Waveshare Night Vision Camera Module 5MP OV5647 Back with Cooling Holes to work with yyh1002's Modular Mounting System, but was not happy with the messy cable. So, i added a mount to work with hamkers Raspberry Pi CAM Mount with integrated cable management.

Hardware:
4 - m3x12 screws

I just cut my threads into the case very easily and they were flush with the back of the case. You may want to use longer screws with some m3 nuts on the back. it's all personal preference and/or the quality of your print.

Update: Added 2 new versions to work with Pi Cam with bigger board remixed from Monkeybear's mount.
V4 is slightly bigger than V3 as the PiCam i had didn't fit into Monkeybear's original mount.