Hold the system board by its edges and angle
it toward the back of the computer.
Lower the system board into the computer until
the connectors at the back of the system board align with the slots
on the chassis, and the screw holes on the system board align with
the standoffs on the computer.
Tighten the #6-32*5.4 screws to secure the
system board to the computer.
Place the metal tab on the system board and
tighten the screw to secure the metal tab to the system board.