Fitting out the Whaly - testing the second seat

The Whaly has been partially fitted out by Lindon Marine. They installed the ePropulsion outboard motor, battery, steering console and Bimini - but the rest is up to us. The first is to install a second seat.
Talking to other members of the club for the best ideas we think installing the seats fitted onto a plank of wood should be the easiest way of achieving the setup.