Lenovo ThinkStation P920 Manual page 24

BCA-P: Blind Connect Assembly consisting of two 8639-SFF (U.2) ports
(supporting PCIe, SAS, or SATA drives) and two 8482-SFF ports (supporting SAS
or SATA drives). The assembly also contains the following cable connections:
- One 4-pin power connector that connects to the motherboard.
- Two mini-SAS HD connectors that connect to the Broadcom adapter (for
PCIe connections).
One mini-SAS HD connector labeled "S/X" that connects to either the
-
onboard Intel controller or the Broadcom controller.
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