Dell PowerEdge C6220 - Manual (Page 272)

272 | Installing System Components
4 Disconnect all the cables from the backplane and expander card. See
Figure 3-86 and Figure 3-87 for 2.5-inch hard drives expander
configuration.
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.
Figure 3-86. Back View of the 2.5” Hard-Drive Backplane for Expander
Configuration
1 backplane power connector for
power supply 1
2 Expander-card connector 1
3 Expander-card connector 2 4 backplane power connector for
power supply 2