Check out this pretty good product video from Norotos. It shows exactly how you can use this mount.
The Norotos INVG HMA (Improved Night Vision Goggle Helmet Mount Assembly) features the latest helmet mount technology, unique stowage positions, and our patented safety feature to assure continued system functionality when exposed to harsh environmental and combat conditions. The Universal Shroud is designed to easily mount a night vision goggle to a 3 hole or 1 Hole helmet without the need for straps. The Universal Shroud attaches to various 3 hole and 1 Hole ballistic helmets with the most common being the MICH.
Check the video for more intel or go to their website: http://www.Norotos.com