Dell PowerEdge C6220 II Hardware Owner's Manual page 265

13 Remove the screws that secure the mid-plane holder support to the
chassis. See Figure 3-81.
14 Lift the mid-plane holder support out of the chassis. See Figure 3-81.
Figure 3-81. Removing and Installing the Mid-plane Holder Support
1 screw (3) 2 mid-plane holder support
Installing System Components | 265