First, make sure not to cover any of the lasers with the Velcro or foam pads. Follow these instructions to install:
Peel Velcro fasteners from the backing.
Affix Velcro to the inside of the helmet, with the sticky side adhering to the helmet and the Velcro facing out.
Connect foam pads to the Velcro.
Note: Placing the foam on the back of the helmet, over speaker holes will not interfere with audio transmission.