Spare cushion in Kemerton XL?

We seem to have a spare cushion which we can't work out what to do with.

It is about 18" square with a solid back, and a  "tab" on one side as if it fits under something, on the back there is Velcro, but can't work out what it is for?

Hi, you may find the answer to your question by looking at the Practical Motorhome review of a 2014 Kemerton. Regards.

Thank you, it looks like it might go behind the passenger seat as a "backrest" not sure why the Velcro, as over time that would just mess the seat back up.

I use this cushion to extend the bed behind the drivers seat when sleeping as it stops the pillows falling down.
I you slide the drivers seat right forward it fits in there good addition as I said stops the pillows falling down.

Campbell