Dell PowerEdge C6220 - Manual (Page 219)

Installing System Components | 219
5 Remove the screws that secure the 10GbE mezzanine card assembly.
See Figure 3-50.
6 Lift the 10GbE mezzanine card assembly away from the card bridge
board on the system board. See Figure 3-50.
Figure 3-50. Removing and Installing the 10GbE mezzanine card assembly
1 screw (4) 2 10GbE mezzanine card assembly
3 card bridge board 4 system-board assembly