Night Optics Falcon 6x Gen 3 Gated Long-Range Night Vision Binocular - Manual (Page 94)

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(2) Press the release button (Figure 2-23) to remove the
mount from the helmet mount bracket.
Figure 2-23. Helmet Mount.
(3) Make sure the strap is laced onto the helmet mount
bracket as shown in Figure 2-22.
(4) With catch (see Figure 2-22) in forward most position,
place the strap over the top of the helmet center (see Figure 2-23).
(5) Hook the rear bracket on the center of the back of the
helmet and lay the strap with helmet mount bracket over the top of
helmet.