Dell XPS 14 (L421X, Mid 2012) - Manual (Page 13)

5 Remove the screws that secure the base-cover assembly to the palm-rest assembly.
6 Starting from the back of the computer, carefully pry the base-cover assembly,
turn the base-cover assembly over, and place it on the palm-rest assembly.
2
1
3
4
1 screws (2) 2 T5 screws (6)
3 base-cover assembly 4 tabs (2)
Removing the Base Cover | 13