1. Remove the film that covers the thermal pad on the carrier, if any. Then, install the M.2 solid-state drive by sliding the drive in the carrier.
2. Move the film that covers the thermal pad at the bottom of the heat sink, if any. Then, install the heat sink onto the M.2 drive in the bracket.
3. If not already present, install the M.2 drive bracket into the system.
4. Install the heat sink with the bracket into the system.
5. Insert the stopper.
Note: The Tower systems come equipped with only the necessary onboard M.2 parts required for the configuration when it was originally ordered from Lenovo or other.
Adding an M.2 drive to an open onboard slot requires the option kit: 4XF1C39743, which includes the heatsink assembly and stopper seen in the instructions above.
For supported double-sided 4TB M.2 drives, FRU: 5F10U94103 is needed instead.
Further clarification is needed on the differences and uses of these three thermal pads.