H3C Technologies H3C S7500E Series Switches - Manual (Page 21)

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Figure 5 Locating the position on the rack for installing the slide rail
(1) Middle of the narrower metal area between holes
3. Install six cage nuts on the square holes on each rack post, as shown in Figure 6 .
Figure 6 Installing a cage nut
4. Align the installation holes on the front end of the slide rail with the cage nuts on the front rack post,
and fix them with screws, as shown in
Figure 7 .