7Attach the Outer Slide Rail to Round and Square Hole Racks
Align the front of one of the outer slide rails with the rack upright, push it forward, and click it into place. Align the rear of the outer slide rail with the rack upright, pull the release tab, push the slide rail toward the rack, release the tab, and click it into place.
Note For racks shorter than 24 inches in depth, remove the rear bracket with a Phillips head screwdriver, pull the release tab, and adjust the slide rail to the appropriate length for the rack.
Front of
RackRear of
Rack
Rear of 
Bracket
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Secure the other outer slide rail to the rack by repeating the previous steps.
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Go to the “Install the Chassis” section on page 10.
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