Dell XPS 13 7390 2-in-1 Service Manual page 19

Steps
1. Slide the palm-rest assembly under the display assembly.
2. Align the screw holes on the palm-rest assembly with the screw holes on the display hinges.
3. Replace the four screws (M2.5x3) that secure the display hinges to the palm-rest assembly.
4. Route the display cable and camera cable through the routing guides on the system board.
Removing and installing components 19