Dell XPS 11 (9P33, Late 2013) - Manual (Page 9)

Removing the Base Cover | 9
3 Remove the screws that secure the base cover to the palm-rest assembly.
4 Loosen the captive screws that secure the base cover to the palm-rest assembly.
5 Place the computer with the rear side facing you, and gently pry up the base cover.
1 screws (Torx) (6) 2 base cover
3 captive screws (4) 4 screw (Phillips)
1
2
4
3