Dell EMC PowerEdge R940 Installation And Service Manual page 94

Figure 49. Cable routing – 24 x 2.5 inch hard drive backplane with PERC
1 expander board
3 24 x 2.5 inch hard drive backplane
5 backplane signal cable
7 cable management bracket (left)
9 storage controller card (slot 6)
11 backplane power cable B
94 Installing and removing system components
2 SAS cable
4 backplane power cable A
6 system board
8 storage controller card (slot 1)
10 cable management bracket (right)
12 SAS cable