HP Xw9400 - Workstation - 16 GB RAM Reference Manual page 89

2. For both short and tall PCI cards, attach the hooks of the PCI retainer (1) under the slots on the
rear of the chassis, and then rotate the retainer down until the retainer arm (2) supports the card.
Figure 5-21 Installing the short or tall card PCI retainer
ENWW Removing and replacing components 79