IBM HS22 - BladeCenter - 7870 Installation And User Manual page 49

9. Carefully turn over the expansion-unit riser assembly, and use a Phillips
screwdriver to install the four non-captive retaining screws, as shown in the
following illustration.
10. Turn over the expansion-unit riser assembly and install the riser assembly into
the expansion unit system board, as shown in the following illustration.
11. Carefully reposition the expansion-unit riser assembly, aligning it with the
expansion-unit system-board-assembly rails.
12. Firmly slide the assemblies together until the tray-release button securely
locks the panels.
13. Connect the auxiliary power cable (A), as shown in the following illustration.
Chapter 3. Installing options
35