Lenovo ThinkSystem SR630 V3 User Manual page 326

Cable routing for onboard configuration with one processor
The following table shows the mapping relationship between backplane connectors and processor board
connectors for onboard configuration.
The following figure illustrates the cable routing for the onboard configuration of 4 x 2.5-inch front NVMe
drive bays. Connections between connectors:
Figure 271. Cable routing for onboard configuration of 4 x 2.5-inch front NVMe drive bays with one processor
Table 71. Mapping between backplane connectors and processor board connectors for onboard configuration
Backplanes
Front BP (NVMe)
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↔ ↔
, ,
1 1 2 2
From
NVMe 2–3, NVMe 0–1
↔ ↔
, ...
3 3 n n
To
PCIe 1, PCIe 2