Ruijie RG-AP9861-R Hardware Installation And Reference Manual page 36

Hardware Installation and Reference Guide
(1) Locate the intersection of the U-rail and the T-rail. Drill four holes on the ceiling cover, distributing them in the
four quadrants created by the intersection.
Figure 3-23 Installing the Ceiling Cover
(2) Install the security screw on the mounting bracket. Leave no gap between the bracket surface and the base
of the screw's head.
Figure 3-24 Installing the Security Screw on the Mounting Bracket
(3) Secure the mounting bracket by threading two steel ropes through the mounting holes (indicated by letter B
in Figure 3-1Mounting Bracket Dimensions) on the mounting bracket and the holes on the ceiling cover.
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Installing the Access Point