Figure 120. Power cable connections for 8 x 2.5-inch front drive backplanes
From To
1  Backplane 1: PWR 1  Backplane 1 power connector on the system board 
assembly
2  Backplane 2: PWR 2  Backplane 2 power connector on the system board 
assembly
3  Backplane 3: PWR 3  Backplane 3 power connector on the system board 
assembly
Signal cable connections
Refer to the specific topic for signal cable connections depending on the backplanes installed.
•  One front backplane: 
– 
“One 8 x SAS/SATA backplane” on page 166
–  “One 8 x AnyBay backplane” on page 169
•  Two front backplanes: 
164 ThinkSystem SR655 V3 User Guide