Optoma OCM815B User Manual - Page 8

(2A) Attaching the Universal Head Assembly to the projector: 2A.1- Loosen the M5x10mm Socket Button Cap Screws using the 3mm Allen key until you can slide the extension brackets freely, as shown. Universal Head Assembly 3mm Allen Key M5x10mm Socket Button Cap Screw Extension Bracket 100mm 2A.2- Place projector's Flush Mount Assembly over the projector and align the centre of the Flush Mount with the projector's approximate Centre of Gravity. Centre of Universal Head Assembly This surface to be approximate parallel to the Projector front Centre of Gravity 8 *Specifications are subject to changes without notice.