To install a different M.2 SSD:
1.
Remove the small silver screw from the 110mm or 80mm metal standoff on the
board (A).
2.
Remove the pre-installed SSD from the connector if there are any.
3.
Make sure there is the metal standoff in the right position, depending on the
length of the SSD you are going to install
4.
Align the space at the bottom of the new M.2 SSD to the key on the connector
(B).
5.
Secure the card to the standoff with the small silver screw (C).