BenQ PE7700 Ceiling Mounting Manual page 7

STEP E
Assemble the PROJECTOR ADAPTER and PROJECTOR with 4 M6 SCREWS.
M6 SCREW
STEP F
Slide the projector with adapter into the ceiling assembly and fix the projector with 4 M3 SCREWS.
Ceiling mount bracket
M3 SCREW
BASE-ASSEMBLY
Installation finished.
Installing a Projector with the Ceiling Bracket 7