My 19' has an awning, but it was stock from the factory. The arms fold up into the case that holds it and they latch into connectors on the side of the van. A very custom made awning to ft the specific van.
If you look in the green strip between the front passenger door and the rear door you'll see the front attachment point for one awning pole (level with the key hole). The rear one is between the furnace vent and the gravity water tank filler (a lil hatch door).
You might have to consider a rope and pole awning like 50s-60s travel trailers use: Vintage Trailer Awning