Dell EMC PowerEdge R940 Installation And Service Manual page 92

Figure 47. Cable routing – 8 x 2.5 inch hard drive backplane with PERC
1 8 x 2.5 inch hard drive backplane
3 SAS cable
5 system board
7 storage controller card (slot 1)
92 Installing and removing system components
2 backplane power cable
4 backplane signal cable
6 cable management bracket