Dell PowerEdge C6220 Hardware Owner's Manual page 248

Figure 3-80. Cable Routing−Bottom Middle Plane to 2.5" Hard Drive for Expander
Configuration
Item Cable
Hard-drive
backplane
cable
Hard-drive
backplane
cable
248 | Installing System Components
From
(Bottom Middle Plane)
mini-SAS connector for
system board 1 (J1)
mini-SAS connector for
system board 3 (J3)
To
(Expander Card)
mini-SAS connector
( 4~7) for system
board 1
mini-SAS connector
(12~15) for system
board 3