CPU and Motherboard - Build an Awesome PC - page 23

Figure 15—Snap the MOBO's I/O cover plate into this opening.
Figure 16—Note the orientation and position of the mounted I/O cover.
Check the alignment of the I/O ports to verify that they line up with the holes
on the I/O plate we installed earlier. Once positioned, secure the MOBO to
the mounting posts with the screws that accompanied the PC case, as shown
in Figure 17, The MOBO mounted in the PC case , on page 24 . Don't overtighten
the screws. Doing so could snap off the screw heads as well as bend or crack
the motherboard.