Delta RT Series User Manual page 26

Unscrew the screws and pull out the UPS's front bezel .
(Figure 6-4: Remove the screws.)
Pull out the control panel , rotate the panel and the Delta logo nameplate 90° clockwise
 and re-insert the control panel  (see Figure 6-5). Re-attach the front bezel to the UPS and
tighten the screws  (see Figure 6-6).
(Figure 6-5: Rotate the Control Panel and the Delta Logo Nameplate)
(Figure 6-6: Reattach the front bezel to the UPS.)
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Amplon RT Series