Park the vehicle on the horizontal ground, and then stick the level horizontally
above the target area (adjust the inclination angle of the level to center the bubble).
Stick the bracket with the connection of the bracket facing down (with the toothed
side facing left).
Tear off the 3M adhesive film on the bracket to stick the bracket horizontally on the
front windshield with the level as reference, and then press the bracket for 10s to
ensure no bubbles between the bracket and the glass.