This is about locating the peripheral drive power connector.
Where is the Peripheral Drive Power Connector for the Intel® Server Board S2600WT Family?
The server board includes one 6-pin power connector intended to provide power for peripheral devices such as Optical Disk Drives (ODD) and/or Solid State Devices (SSDs). On the server board this connector is labeled as “Peripheral_ PWR”:
Refer to section 10.1.3 of the Technical Product Specifications (TPS) for the connector pin-out.