Dell PowerEdge C6220 II - Manual (Page 8)

Getting Started With Your System | 6
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.
6
Install and tighten the screws.
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