With your helmet and glasses on, check where the temple of your glasses sits.
The mount should be attached at the same position as the glasses temple.

For most open face helmets,

attach the Velcro either to the inside of the helmet or to the pad, as shown in the photo.

Attach the mount to the Velcro from Step 2.

Align the mount with your eye line, and position it with the tip facing either downward or upward, depending on your preferred fit.

After completing all steps, close the pad to complete the installation.