Sony FDRX3000/W Manual page 28

Example of optional accessory attachment
Universal head mount kit
BLT-UHM1
Backpack Mount
VCT-BPM1
Note
Thread a suitable leash through the leash attachment hole of the Underwater Housing, then attach the leash
to an item you intend to use with the camera.
Before use, confirm that the screw on the attachment buckle is not loose.
[19] Getting Started
Notes on using the adhesive mount (sold separately)
The adhesive mount is used for fixing the camera to an item you intend to use. The adhesive mount
is general term for the attachment buckle, flat adhesive mount, and curved adhesive mount.
Press firmly on the adhesive portion.
Using accessories