IBM FC EJ08 Manual page 27

Figure 10. Opening the PCIe adapter retainers for the 9080-M9S system so you can slide them
off and discard them.
Note: The PCIe adapter retainers are not needed.
b) Press the adapter firmly into its connector as shown in the following figure, ensuring that it is
seated.
Installing PCIe adapters in the 9080-M9S system 13