For most helmets, attach the mount to the cheek pad or to the inner shell area of the helmet.
For Arai helmets, please attach it to the upper foam liner above the cheek pad.

After removing the cheek pad from the helmet, attach the Velcro to the foam area shown in the photo.

Attach the mount to the Velcro applied in Step 2.
Press it firmly into place so that only the outer edge of the mount remains visible.

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