Apple Xserve RAID (Locking Switch Replacement) - Manual (Page 5)

Xserve RAID Locking Switch - 5
4. With one person supporting each side of the unit, slide it all the way into the rack until
the unit engages the small posts at the rear of the L-brackets. (Figure 5)
Figure 5
5. Replace the two screws that secure the unit to the front rail of the rack.
6. Reconnect all cables and power cords.
Warning: Never turn on Xserve RAID unless all of its internal and external parts
are in place and it is closed. Operating the system when it is open or missing
parts can damage it or cause injury.