Apple Xserve (Early 2009) - Manual (Page 42)

42 Chapter 2 Installing or Replacing Components
6 Align the riser with the slot on the main logic board and press to seat it.
7 Tighten the captive screws that secure the riser bracket to the back panel.
8 Return the Xserve to the rack and start it up.
9 Configure the card.
To configure an Ethernet card, open the Network pane of System Preferences.
To configure a Fibre Channel card, open Fibre Channel pane of System Preferences.