Using the cable-access opening in the top of the S2 25U rack
Complete the following steps to route external cables through the cable-access
opening in the top of the S2 25U standard rack.
Figure 21. Location of S2 25U cable-access opening
1. Use a flat-blade screwdriver to pry the cable-access cover off the rack.
2. Snap out and discard the center of the cable-access cover.
3. Replace the outer ring of the cable-access cover in the cable-access opening.
4. Route the cables through the opening.
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IBM S2 25U Standard Rack and IBM S2 42U Standard and Expansion Racks: Installation Guide
Cable-access opening