Dell P127F Owner's Manual page 64

Steps
1. Place the M.2 2230 solid-state drive holder on its slot on the palm-rest assembly.
2. Align the notch on the M.2 2230 solid-state drive with the tab on the M.2 2230 solid-state drive slot.
3. Slide the M.2 2230 solid-state drive into the M.2 2230 solid-state drive slot.
4. Replace the screw (M2x3) that secures the M.2 2230 solid-state drive to the palm-rest assembly.
5. Align the solid-state drive thermal shield on the palm-rest assembly.
6. Replace the two screws (M2x3) that secure the solid-state drive thermal shield to the palm-rest assembly.
Next steps
1. Install the base cover.
2. Install the SIM card.
3. Follow the procedure in
64 Removing and installing Customer Replaceable Units (CRUs)
After working inside your computer.