BenQ 9H.F6GPK.NA4 Installation Handbook page 59

Step 5: Installing both Bracket L and Bracket corner on the frame at four corners
1. Installing Bracket L
2. Installing Bracket corner
3. Repeating the same actions at four corners
Step 6: Assemble Pipe TOP and Pipe BOT
1. Assemble Pipe TOP and Pipe BOT
2. Fix 4 Cover plates
Mounting installation 59