Buick PARKAVENUE 1994 Manual page 46

Lap-Shoulder Belt
The positions next to the windows have lap-shoulder
belts. Here's how to wear one properly.
1. Pick up the latch plate and pull the belt across you.
Don't let it get twisted.
2. Push the latch plate into the buckle until it clicks.
Pull up on the latch plate to make sure it is secure.
When the lap belt is pulled out all the way, it will
lock.
If
it does, let it go back all the way and
start
again.
If
the belt is not long enough, see "Safety Belt
Extender" at the end of this section. Make sure the
release button on the buckle is positioned so you
would be able to unbuckle the safety belt quickly if
you
ever had to.