Dell PowerEdge C6220 II Owner's Manual page 234

5 Remove the screws that secure the 10GbE mezzanine card assembly.
See Figure 3-60.
6 Lift the 10GbE mezzanine card assembly away from the card bridge
board on the system board. See Figure 3-60.
Figure 3-60. Removing and Installing the 10GbE mezzanine card assembly
1 screw (4)
3 card bridge board
234 | Removing and Installing System Components
2 10GbE mezzanine card assembly
4 system-board assembly