Yolink Garage Door Sensor 2 User Manual page 12

You can also mount the Garage Door Sensor 2 to the wall with screws.
Remove the battery cover and take out batteries.
Keep the longer side of the Garage Door Sensor 2 parallel to the floor, mount Garage
Door Sensor 2 to the top left of inside garage door using screws (not included).
Re-install the batteries and close the battery cover.
Remove the battery cover
1
and take out batteries
SET
2
SET
Mount the Garage Door Sensor 2
SET
TOP
PANEL
10