Asus AP1700 - Manual (Page 22)

2-4 ASUS AP1700
2.2 Motherboard placement
Before you install the motherboard, study the configuration of your chassis
to ensure that the motherboard fits into it. The PR-DLS533 uses the
extended ATX form factor that measures 12 inches x 13 inches (30.5 x 33
cm).
Placement direction
When installing the motherboard,
make sure that you place it into the
chassis in the correct orientation. The
edge with external ports goes to the
rear part of the chassis as indicated in
the image below.
Make sure to unplug the power cord before installing or removing the
motherboard. Failure to do so may cause you physical injury and
damage motherboard components.
Place this side towards
the rear of the chassis
Motherboard Screws
Place thirteen (13) screws into the
holes indicated by circles to secure the
motherboard to the chassis.Do not
overtighten the screws! Doing so may
damage the motherboard.