Dell POWEREDGE C6105 - Manual (Page 159)

Installing System Components | 159
Figure 3-45. Removing and Installing the Mid-plane Holder
1 screw (8) 2 mid-plane holder
14 Disconnect all the cables from the lower middle plane. See Figure 5-9.
Note the routing of the cable underneath the tabs 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.
15 Remove the screws that secure the lower middle plane to the chassis.
Figure 3-46.
16 Lift the lower middle plane out of the chassis. See Figure 3-46.