The bench stays in place. Both locks are linked by a bar, that can be conveniently hidden under the bench. When rotating any lock, they both rotate together.
If you have to fold the whole bench to get out you are less likely to accidentally leave something behind. But I guess the real reason for this design is probably that folding the bench saves some space.
The bench stays in place. Both locks are linked by a bar, that can be conveniently hidden under the bench. When rotating any lock, they both rotate together.