IBM Power System POWER7 Series Common Service Procedures page 120

Figure 44. Short adapter in the PCI adapter cassette with the supports and the hookarm in place
d. Replace the cassette cover by doing the following steps:
1) Slide the cover (B) into position on the cassette.
2) While holding the cover latch (A) in the open position, place the cover over the pivot pin (C).
3) Release the cover latch to lock the cover into place.
106