Dell XPS 13 (L322X, Early 2013) - Manual (Page 16)

Replacing the Power-Light Board
1 Align the screw hole on the power-light board with the screw hole on
the palm-rest assembly.
2 Replace the screw that secures the power-light board to the
palm-rest assembly.
3 Slide the power-light board cable into the system-board connector
and press down on the connector latch to secure the cable.
Postrequisites
1 Replace the base cover. See "Replacing the Base Cover" on page 14.
2 Follow the instructions in "After Working Inside Your Computer" on page 11.
Power-Light Board 16