IBM Power System 9009-22G Manual page 41

Figure 23. Connecting the NVMe cable for a system with one NVMe U.2 pass-thru card in P1-C49 and
a filler in slot P1-C50
If you have two NVMe U.2 pass-thru cards, one is installed in slot P1-C49 and the other one is
installed in slot P1-C50.
One NVMe cable connects from port (J1) on the NVMe drive backplane to port (J1) on the NVMe
U.2 pass-thru card in slot P1-C49. One NVMe cable connects from port (J2) on the NVMe drive
backplane to port (J1) on the NVMe U.2 pass-thru card in slot P1-C50. See the following figure.
NVMe U.2 pass-thru card for the 9009-22G or 9223-22S 27