Dell PowerEdge C6220 II Hardware Owner's Manual page 285

Figure 3-96. Top View of the Expander Card
1 Power control connector
3 mini-SAS connector (12~15)
5 mini-SAS connector (0~3)
5 Disconnect front panel cables from the power distribution board. See
Figure 3-105.
Note the routing of the cable on the chassis as you remove them from
the system. You must route these cables properly when you replace
them to prevent the cables from being pinched or crimped.
2 mini-SAS connector (4~7)
4 mini-SAS connector (8~11)
Installing System Components | 285