IBM Power System 9040-MR9 Manual page 96

Figure 83. Replacing the PCIe adapter cassettes
c) Repeat steps "8.a" on page 81 through "8.b" on page 81 to replace the remaining PCIe adapter
cassettes.
9. Using your labels, reconnect all of the external cables that plug into the PCIe adapters.
10. Using your labels, reconnect the power cords (A) to the system unit as shown in the following figure.
Fasten the power cords to the system by using the hook-and-loop fasteners (B) as shown in the
following figure.
82 Power Systems: System backplane