Dell XPS 14 9440 Owner's Manual page 39

Figure 13. Placing the base cover into slots on the palm-rest assembly
5. Align the screw holes on the base cover with the screw holes on the palm-rest assembly before applying slight pressure to
the base cover.
6. Snap the base cover into place on the palm-rest assembly.
Removing and installing Field Replaceable Units (FRUs) 39