You just unclip it from the box that it comes in. Then put the straps of the helmet mount through two vents, cross on the inside of the helmet, and bring them up through the opposite holes they went through. ex. left goes down through hole 1, up through hole 2. Right goes down through hole 2, up through hole 1. Then put the straps through the little cinch things on the side of the mount, pull them tight, clip the cinch down. Then slide the camera back into the mount until it clicks and is locked in.
do i use the screw and nut from the mount it comes with? because i popped the nut of that one out, and placed it in the head strap mount, but now neither will the screw thread, or will the nut come out of the head strap mount.