Seating arrangements...lets see them.

[SkunkBoat]

100 qt cooler in place of the passenger pedestal.
Backrest made from pvc fence post and pvc board lumber.

I did not want any holes in deck or hardware to trip on so I have an eye bolt in the side of the cooler and an eye bolt in the wall of the cuddy and I use a clip to hold together.
Admittedly, could use better mounting.When we run, my brother likes to stand so he disconnects the cooler and usually never connect it back and the cooler slides around

The because of cushion thickness, cooler has to be hinge toward centerline so the lid will open.