Dell EMC PowerEdge R940 Installation And Service Manual page 62

Figure 54. 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 (BP: BP SIG to MB)
7. cable management bracket (left)
9. storage controller card (slot 6)
11. backplane power cable B (BP: BP PWR_B to MB)
62 Installing and removing system components
2. SAS cable (BP: BP SAS A1, BP SAS B1 to RAID controller)
4. backplane power cable A (BP: BP PWR_A to MB)
6. system board
8. storage controller card (slot 1)
10. cable management bracket (right)
12. SAS cable (BP: BP SAS A0, BP SAS B0 to RAID controller)