Secure The Magnetic Base Onto The Ceiling - Jimi JH08 User Manual

5.2.2 Drill holes on the ceiling according to position of the magnetic base.

5.2.3 Secure the magnetic base onto the ceiling

Use one setscrew and one screw to secure the magnetic base to the ceiling.
5.2.4 Press back the circle top cover
5.2.5 Place the device onto the magnetic base, and then adjust the angle to a proper position.