Optoma OCM815W User Manual - Page 9

User Operation Guide 2A.3- Place the Bottom Spacers in between the Extension Brackets and the Projector, and align the mounting holes as shown below. Bottom Spacer Extension Bracket Bottom Spacer Mounting Hole NOTE If the mounting holes on your projector are recessed, you may need to use the additional spacers supplied in the parts bag. Please select the appropriate spacers according to the design of your projector. Note 2: If you cannot align the 100mm Extension Bracket to the mounting hole on your projector, you may need to use the additional 50mm Extension Brackets shown in the diagram on the right. M5x10mm Screw Extension Bracket Square Nut Bottom Spacer 9