There are two more PCBs in the camera face assembly. The Top PCB is held in place via a zero force insertion connector.

A Spudger Tool can be used to remove the Top PCB by gently prying the Top PCB loose near the zero force insertion connector, and working around the outside of the Top PCB prying it loose further with the Spudger Tool

The Siren/Speaker is also connected to the Top PCB and can be unplugged.