Buick 1995 Century Owner's Manual page 27

To reattach the automatic belt:
1. Close and lock the door.
2. Adjust the seat (to see how, see "Seats" in the Index)
so you can sit up straight.
3. Pick up the latch plate and pull the belt across you.
Don't let it get twisted.
4. Push the"1atch plate into the buckle until it clicks.
Pull up on the latch plate to make sure it is secure.
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