HP Compaq Server Console Switches - Manual (Page 9)

Installing the HP KVM Server Console Switch G2 9
4. Secure the console switch to the rails using the appropriate number of M-6 screws.
Performing a side-mount installation
1. Remove the four screws, two on each side, from the console switch.
2. Attach the side-mounting brackets to the console switch using the four screws you removed.