IBM Power System POWER7 Series Common Service Procedures page 118

Figure 42. Long adapter in the PCI adapter cassette with the supports and stabilizer in place
Adapter-cassette retainer placement for medium-length adapters
v Remove the adapter stabilizer (C). See Figure 43 on page 105.
v Place and lock the retainers (B).
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.
104