Dell PowerEdge C6220 - Manual (Page 215)

Installing System Components | 215
5 Remove the screws that secure the 1GbE mezzanine card assembly.
See Figure 3-47.
6 Lift the 1GbE mezzanine card assembly away from the card bridge
board on the system board. See Figure 3-47.
Figure 3-47. Removing and Installing the 1GbE mezzanine card assembly
1 screw (4) 2 1GbE mezzanine card assembly
3 card bridge board 4 system-board assembly