Pcie Riser Assembly - Lenovo ThinkSystem SR250 V3 System Configuration Manual

Backplane, four 3.5-inch hot-swap drives
Figure 15. Backplane, four 3.5-inch hot-swap drives
Backplane, eight 2.5-inch hot-swap drives
Figure 16. Backplane, eight 2.5-inch hot-swap drives
Backplane, ten 2.5-inch hot-swap drives
Figure 17. Backplane, ten 2.5-inch hot-swap drives

PCIe riser assembly

Use this information to locate the connectors on the PCIe riser assembly.
ThinkSystem SR250 V3 System Configuration Guide
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