That's the one! Tested it on the car awning, yet to try on the van but can't see why it wouldn't work.
I've added a couple of eyelets about a third of the way down on each side for the poles.
and I paid too much.....$31.....amazingly good value
I've only used it with the vecro loops around the support arm and peged down to the ground, worked very well as a wind break, next time I'm away I'll try it in the anti flapper, I was also thinking about a couple of extra eyelets in a similar spot.