IBM Power System POWER7 Series Common Service Procedures page 144

Figure 65. Adapter removed from the PCI adapter single-width cassette
5) Position the adapter retainers to support the adapter, and then rotate the retainer clip (B) into
the closed position. See Figure 65
Note: Two retainers are located at the top of the cassette, along the top edge of the adapter.
Two more retainers are located at the edge of the cassette opposite of the adapter tailstock.
When the adapter retainer clip is in the horizontal position, the adapter retainers are unlocked
and can slide toward the adapter. Place the retainers on the adapter according to the length of
the adapter being used. Select the appropriate instructions:
v Adapter-cassette retainer placement for large adapters
v Adapter-cassette retainer placement for mid-sized adapters
v Adapter-cassette retainer placement for small adapters
Adapter-cassette retainer placement for long adapters
v Place and lock the retainers (B). See Figure 66 on page 131.
Attention: Use of the lower corner support retainer might interfere with the docking of
the PCI card when positioned within the system. Ensure the retainer does not interfere with
the adapter connectors on the system backplane.
v Ensure the adapter edge is seated in each retainer groove (A). If the shape of the adapter or
the presence of a connector will not allow the adapter edge to be seated into the retainer
groove, ensure the retainer is still locked firmly against that edge or connector.
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