Dell PowerEdge C6220 Handbuch Zum Einstieg Mit Dem System Seite 8

4 On each vertical rack flange on the back, put two screw bases into
the two square holes right above the rail. See Figure 3.
5 Install the chassis stabilizer shipping brackets (optional) on the back
rack flanges. See Figure 3.
6 Simultaneously fasten the screws. See Figure 3.
NOTE: To transport systems already installed in the rack, ensure that the two
chassis stabilizer shipping brackets (optional) are in place.
Figure 3 Installing the Chassis Stabilizer Shipping Brackets
Getting Started With Your System | 6