Hi Jeff, glad you were able to get an awning.
re: The brackets you show - These brackets end up creating a couple of issues used on our vans. First, the forward bracket would be mounted on the passenger door which would then preclude use o that door if it is holding the leg. Second, the angle from the awning to the bracket on the van necessitates walking around the diagonal leg.
One member went to effort of creating a pull out rod with those leg brackets mounted to nested square tubes that extended out from under the van rocker panel. (I cannot find the picture/link) but it was clever. I do not think it resolved he front door opening issue though.
Personally, we always use the awning legs in a vertical orientation and either use the Fiamma straps or stakes that come with the awning to secure it to the ground. A solution for weighting the legs would be to get a couple of 10 lb barbell weights and cut a slot in them to slip over the leg feet or a couple of jugs with water or sand.
Faimma Straps