H3C S1850 Series Getting Started Manual page 6

Figure 6 Hole spacing
Insert one screw anchor into each hole until the anchors are
2.
flush with the wall surface.
Drive one screw into each screw anchor, and tighten the screw
3.
to secure it in the wall anchor.
Leave a minimum clearance of 1.5 mm (0.06 in) between the
base of the screw head and the screw anchor so the switch can
hang on the screws securely.
Figure 7 Driving a screw into a screw anchor
6