Lenovo THINKSERVER 3821 - Manual (Page 173)

The following illustration shows the internal SAS/SATA cable routing and connectors
from the ServeRAID BR10i controller to 16 2.5-inch hard disk drives.
The following illustration shows the cable connectors on the ServeRAID-BR10i
controller.
1 ServeRAID-BR10i controller
2 Cable connector for drives 0 - 3
3 Cable connector for drives 4 - 7
Chapter 7. Installing optional devices and replacing customer replaceable units 165