Honda Civic Coupe 2000 Owner's Manual page 17

Protecting Adults
Never place the shoulder portion of a
lap/shoulder belt under your arm or
behind your back. This could cause
very serious injuries in a crash.
Driver and Passenger Safety
Using the Lap Belt
Insert the latch plate into the buckle
marked CENTER.
If the belt is too short, hold the latch
plate at a right angle and pull on the
plate to extend the belt. Then insert
the latch plate into the buckle, and
tug on the belt to make sure the belt
is securely latched.