American Dynamics VideoEdge IP Indoor Mini-dome 8200-2646-02 B0 - Manual (Page 16)

16 Installation and Operation Guide
2.7 Ceiling mounting
When mounting the camera in the plywood ceiling, please follow steps (1) to (3).
(1) Make 3 entry holes in the plywood ceiling as shown above.
(2) Install the dome in the ceiling, then attach the supplied “ceiling fix plate” to the camera.
(3) Fix the dome to the ceiling using the 3 mounting screws.
ceiling fix plate
screws*3
plywood ceiling