BenQ 9H.F6GPK.NA4 Installation Handbook page 41

Function of Edge Alignment Kit/Pin
Keep adjacent Displace at the same plane and uniform gap.
Without using edge alignment kit/pin.
Installing Edge Alignment Kit
• Before install edge alignment kit, displays must be mounted to video wall frame correctly.
• Using "Thumb Screw" for easy installing.
• Using "Edge Alignment Kit-1" on adjacent four displays.
Video wall installation guide 41