IBM Power System 9040-MR9 Manual page 95

Figure 82. Replacing the power supplies
8. Replace the PCIe adapter cassettes.
a) Slide the PCIe adapter cassette forward until the cassette is fully seated.
b) To lock the cassette in its slot, squeeze the latch lever (A) toward the latch (B) and rotate the latch
(B) in the direction that is shown.
System backplane for the 9040-MR9 81