Dell PowerEdge C6145 Hardware Owner's Manual page 181

11 Remove the screws that secure the mid-plane holder to the chassis. See
Figure 3-40.
12 Lift the mid-plane holder out of the chassis. See Figure 3-40.
Figure 3-40. Removing and Installing the Mid-plane Holder
1 screw (6)
13 Remove the screws that secure the lower middle plane to the chassis.
See Figure 3-41.
14 Disconnect all the cables from the lower middle plane.
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 Lift the lower middle plane out of the chassis. See Figure 3-41.
2 mid-plane holder
Installing System Components | 181