Dell C2723H 27" Video Conferencing Monitor - Manual (Page 35)

Setting Up the Monitor
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C2723H
NOTE: Before attaching the stand assembly to the display, ensure that
the front plate flap is opened to allow space for assembly.
7. Attach the stand assembly to the display.
a. Align and slide the tabs on the stand riser into the VESA slot.
b. Press the stand down till it snaps into place.
C2423H