1993 Buick Century Owner's Manual - Page 46

3. To make the lap part tight, pull down on the buckle end of the belt as you pull up on the shoulder part. The lap partof the belt should beworn low and snug on the hips,just touching the thighs. In a crash, this applies force to the strong pelvic bones. And you'd be less likely to slide under the lap belt. If you slid under the belt it, would apply force at your abdomen. This could cause serious or even fatal injuries. The shoulder belt should go over the shoulder and across the chest. These parts the of body are best able to take belt restraining forces. The safety belt locks there's a sudden stop or a crash. if