Reolink RLC-820A Quick Start Manual page 7

Note: Use the drywall anchors included in the package if needed.
Step 3. Attach the camera.
Align the camera to the mounting plate and turn the camera clockwise to lock it
tightly. Pay attention that these two points should be aligned, which means the
camera has been locked correctly.
Notes:
Run the cable through the cable notch on the mount base.
If you need to take down the camera, please hold and rotate the camera
counterclockwise carefully.
Step 4. Adjust the camera's view angle.
Once the camera is installed, you may rotate the camera body manually to adjust
the camera's surveillance angle.