Lenovo ThinkStation PX Manual page 22

5. Connect the Broadcom NVMe Gen4 cable to the motherboard port "MB_MCIO".
Note: When the Broadcom adapter is in use, the Front Access Bay Storage
cannot be used at the same time.
6. Install the Broadcom adapter in PCIe slot (refer to the P7
installation order).
7. Connect the Broadcom NVMe Gen4 cable plug C0 into the C0 port on the
Broadcom adapter.
HMM for PCIe slot
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