Dell XPS 13 Plus 9320 Service Manual page 13

Steps
1. Remove the six screws (M2x3, Torx 5) that secure the base cover to the palm-rest and keyboard assembly.
NOTE: A Torx #5 (T5) screwdriver is necessary to remove the six screws (M2x3, Torx 5).
2. Place your thumbs and fingers into the recess at the top edge of the base cover.
3. Use both thumbs to pry the base cover in order to release it from the palm-rest and keyboard assembly.
Removing and installing components 13