IBM 5147-024 Manual page 22

7. Locate the two marks that were made previously on the Electronic Industries Alliances (EIA) strips.
8. Align the rail bracket inside the rack cabinet beside the marks, and seat the front of the support rail
bracket pins in the mounting holes. The bottom of the rail support ledge appears slightly higher
than the U mark on the rack flange.
Figure 5. Mounting the rail on the rack
9. Close the front hinge bracket to secure the rail to the rack cabinet flange.
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Power Systems: Installing the Model 024, ESLL, or ESLS storage enclosure