1994 Buick Century Owner's Manual - Page 46

Lap Belt When you sit in a center seating position, or in a station wagon third seat, you have a lap safety belt, which has no retractor. To make the belt longer, tilt the latch plate and pull it along the belt. Buckle, position and release it the same way as the lap part of a lap-shoulder belt. If the belt isn't 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. To make the belt shorter, pull its free end as shown until the belt is snug. 44