Dell 2135cn Service Manual page 736

Chapter 3 Removal and Replacement Procedures (RRPs)
Replacement 52 CONSOLE ASSY PANEL (PL10.2.2)
1) Engage the connector (P/J202) of the
CONSOLE ASSY PANEL.
2) Attach the CONSOLE ASSY PANEL to
the COVER ASSY FRONT, secure it with
the three hooks.
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Version 
2008.02.01