Dell XPS 12 (9Q23, Late 2012) - Manual (Page 34)

3 Remove the screws that secure the I/O board to the palm-rest assembly.
4 Lift the I/O board away from the palm-rest assembly.
1
3 5 4
2
1 I/O-board cable 2 pull tab
3 speakers-cable connector 4 I/O board
5 screws (2)
34 | Removing the I/O Board