Lenovo ThinkSystem Heavy Duty Unpacking Instructions Manual page 8

Figure 11. Removing the outrigger stabilizing bars
Remove the eight screws that secure the two bars to the rack cabinet.
Place the two stabilizing bars on the ground, and remove the bars.
Step 11. Remove the four screws that secure each of the outriggers, and remove the outriggers.
Figure 12. Removing the outriggers
Step 12. Secure the stabilizer to the front of the rack cabinet with four screws.
Figure 13. Installing the front stabilizer
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