HP 5600 - Compaq TFT RKM User Manual page 21

Installation
5. Attach the cable management arm to the rear of the tray with two 6-32 screws.
Figure 2-5: Attaching the cable management arm
6. Carefully route the keyboard power and video cables into the cable management
arm. Then route the cables through the mounting rail opening.
Figure 2-6: Routing the cables
2-6 HP TFT5600 Rackmount Keyboard and Monitor (RKM) User Guide