IBM Power System 9008-22L Manual page 56

Figure 28. Placing the system into the operating position
5. Push the system unit (B) back into the rack until both release latches of the system unit lock into
position.
Secure the cable management arm with hook-and-loop fasteners around the back side of the cable
management arm, but not around the cables.
6. If necessary to view the identify LEDs or to manage cables at the rear of a rack-mounted system,
open the cable management arm by completing the following steps:
Note: If you are removing or replacing the system backplane, you must open the cable management
arm.
a) Release the mounting bracket from the cable management arm assembly by pressing the
indentation (A) on the inner cable management arm tab.
The cable management arm releases from the outer mounting bracket in the direction shown.
42 Power Systems: PCIe adapters for the 9008-22L, 9009-22A, or 9223-22H