CPU and Motherboard - Build an Awesome PC - page 22

Now that our CPU is firmly in place on the MOBO, we can install the mother-
board into our PC case.
Seating the Motherboard
Remove both side panels of the 500R PC case such that the interior frame is
completely exposed. Lay the PC case on its right side so it's easier to position
the motherboard inside it (per the following figure).
Figure 14—The exposed PC case is ready for MOBO mounting.
Before placing the motherboard inside the PC case, attach the plastic I/O
port cover plate that accompanied the motherboard to the knocked-out I/O
shield area in the upper-left side of the PC case, as Figure 15, Snap the MOBO's
I/O cover plate into this opening , on page 23 shows.
Check the orientation of the plate within the rear cutout on the PC case so
that the plate's openings line up with the MOBO I/O ports. Press the I/O
cover against the PC case and the cover should click into place, per Figure
16, Note the orientation and position of the mounted I/O cover , on page 23 .
Ground yourself by touching a metal surface of the PSU before
picking up the motherboard with clean hands. Pick up the moth-
erboard along its sides and avoid touching the bottom of the
MOBO. Gently position it over the nine mounting posts inside the
PC case.