HP StorageWorks 500 G2 Modular Smart Array - Manual (Page 43)

Setup 43
5. Secure the chassis to the rack.
6. Use the shipping bracket to secure the storage system for shipping:
IMPORTANT: Use of the shipping bracket is required only when the
rack is shipped with the MSA500 G2 storage system installed.
a. Loosen the thumbscrew on the shipping bracket.
b. Slide the shipping bracket forward until it engages the chassis.
c. Tighten the thumbscrew.