Dell EMC PowerEdge R620 Owner's Manual page 81

Figure 45. Removing and installing the 2.5 inch (x4) hard-drive backplane
1 hard-drive backplane
3 backplane power cable
5 SAS A cable
Figure 46. Cabling diagram—2.5 inch (x4) systems
1 cable retention bracket
3 integrated storage controller card
2 backplane signal cable
4 release tab
2 system board
4 SAS connector on system board
Installing and removing system components 81