Dell XPS 14 9440 Owner's Manual page 80

Steps
Place the palm-rest assembly on a flat surface.
Next steps
1. Install the keyboard.
2. Install the power button with fingerprint
3. Install the system board.
4. Install the display assembly.
5. Install the battery.
6. Install the M.2 2230 solid-state drive
7. Install the base cover.
8. Follow the procedure in
80 Removing and installing Field Replaceable Units (FRUs)
reader.
or M.2 2280 solid-state drive
After working inside your
from the M.2 SSD slot, whichever is applicable.
computer.