This arm attaches to the B pillar just inside the sliding door on the left hand side.
The great thing about this set up is it gives you an extra table top that wouldn't normally have that can be used by the passenger seat facing backwards. It can be pivoted to the outside of the van door too.
While you wait fit available on this item
400 x 400mm table with cranked leg and brackets
£185 inc vat
(Some table finished may vary price)