Step 1: Attach the cover to the armrest and secure the three-hole base with hex screws.
Step 2: Mark the position on the wall where the holes need to be drilled, and use a drill to drill the holes at the marked positions.
Step 3: Tap the expansion screws into the drilled holes, install the screws into the three-hole base, screw the screws into the wall anchors, and finally move the cover to the three-hole base.