1) Check that the claw of each of the four spacers is latched outward, then
insert the card PCB into the connector. (See Fig. c.)
2) Push the claw of each spacer downward to secure the card PCB. (See
3) Mount the base printed–circuit board by following the mounting
procedure described in Section 2.6.1.
Fig. c Spacer
Mounting a card PCB