Power/Sideband cable routing
Use the section to understand the power and sideband cable routing for 2.5-inch drive backplanes and fan 
board.
Figure 184. Backplane power cable connection for 8 or 10 x 2.5-inch drive backplanes
From To
1  Power connector on the front drive backplane
1  Front backplane power port on the system board 
assembly
244 ThinkSystem SR635 V3 User Guide