Lenovo ThinkSystem SR860 V2 Maintenance Manual page 62

Note: Make sure to match the drive backplane and NVMe switch card connectors as following:
Table 21. Drive backplane and NVMe switch card connectors
AnyBay/NVMe drive backplane
connector
0-1
2-3
4-5
6-7
Figure 31. Connecting cables to the NVMe switch cards
Step 5. Open the retainers of x16/x16 4U PCIe riser cage, and install the two NVMe switch cards to
corresponding slots:
Table 22. NVMe switch cards and corresponding PCIe slot numbers
AnyBay/NVMe drive backplane connectors
0-1, 2-3
1
4-5, 6-7
2
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Switch card connector
C0
C1
C0
C1
PCIe slot number
Slot 10
Slot 12