From To
1  M.2 signal connector 
1  PCIe connectors 8 and 9 on the system board 
assembly
2  M.2 power connector  2  M.2 power connector on the system board assembly
Figure 181. Cable routing for M.2 SATA/NVMe drive PCIe 4.0 backplane with a Gen 3/ Gen 4 SFF RAID adapter
From To
1  M.2 signal connector 
1  C0 on the SFF RAID adapter 
note
2  M.2 power connector  2  M.2 power connector on the system board assembly
Note: The SFF RAID adapter here can be installed in slot 1 or slot 2.
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ThinkSystem SR635 V3 User Guide