Dell Energy Smart Rack Guide D'installation page 26

4 Flip the catches and secure them on the opposite side of the extension
using screws and nuts. See Figure 11.
NOTE:
You must orient the catches such that the screw is installed at the
bottom most hole for all catches. The screw for each catch is installed in the
hole that is closest to the L character.
Figure 11. Installing the Catches on the Extension
1
2
1 catches (4) 2 screws and nuts (4 each)
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Installation Guide