I.R.I.S. 075 - Manual (Page 8)

Fitting the Camera:
Step 1: After you have established the desired mounting position and are
happy there are no obstacles behind the surface into which you are drilling,
over the stick on drilling template into position, ensure you observe the desired
camera orientation before you stick the template down.
The direction of view
is indicated on the drilling template - Be Sure to Set the Correct
Direction of View Before Drilling!
Step 2: Use a drill bit suitable for the fixings you are using to open up 3 pilot
holes in the positions shown on the template, then drill a suitably sized hole
inside the pilot holes to allow cable access.
Iris Innovations: IRIS106 User Guide. v1.00 072013
Camera Fixing Base Plate
Direction of View