Server models with eight 3.5-inch simple-swap drives
Use this section to understand the cable routing for server models with eight 3.5-inch simple-swap drives.
Figure 15. Cable routing for server models with eight 3.5-inch simple-swap drives
The simple-swap drive backplate comes with two power cables and two signal cables. Connect the cables to 
the system board. 
From To
1  Mini-SAS cable labeled with 0 SATA 0-3 connector on the system board
2  Mini-SAS cable labeled with 1 SATA 4-7 connector on the system board
3  Power cable labeled with 0 Backplane power connector 1 on the system board
4  Power cable labeled with 1 Backplane power connector 2 on the system board
30 ThinkSystem SR550 Setup Guide