HP Z Display Z27i 27-inch IPS LED Backlit Monitor - Manual (Page 26)

Mounting the Monitor Without Using the Quick Release 2 Mounting
Bracket
To mount the monitor panel directly to a mounting fixture without using the HP Quick Release 2
mounting bracket, use the four screws removed from the VESA holes on rear of the monitor panel
and install them to attach the mounting device to the rear of the monitor panel.
20 Chapter 2 Setting Up and Using the Monitor