This photo shows the center cushion that came with the seat belt "kit".
The board behind the cushion was part of the kit also.
There is also a bolster for the entire back that came with the kit but
we generally don't carry that with us. As you can see, neither do we
use the "night stand" that came with the vehicle. It stays home.
The seat belts are both draped side by side up and over the backboard
in this photo. See next picture for detail on "hidden compartment".