Cadillac 1994 DeVille Owners Literature page 53

RIGHT FRONT PASSENGER POSITION
L
The right front passenger's safety belt works the same way as the driver's
safety belt. See "Driver Position," earlier in this part.
* *
When the lap portion of the belt is pulled out all the way, it will lock. If it
does, let it go back all the way and start again.
CENTER PASSENGER POSITION
40