IBM FC EJ08 Manual page 26

Figure 9. Removing a tailstock filler from the cassette for the 9080-M9S system
8. Insert the PCIe adapter into the cassette.
a) Choose from the following options:
• If you do not have PCIe adapter retainers, continue with the next step.
• If you have PCIe adapter retainers, complete the following steps:
1) Ensure that the retainer latches (A) are in the open position by pushing up on the latch in the
direction that is shown in the following figure.
2) Slide up the retainers and remove them from the cassette and then discard them.
12 Power Systems: PCIe adapters for the 9080-M9S