1990 Winnebago Chieftain - Dropping Basement Storage Bins

I don't think that it is necessary to bolt through the wall. As mentioned, fabricate a plate to fasten awning mounting point. An aluminum plate 1/4" thick and 50% larger than the anchor fastened with screws on all 4 corners should work well. You can drill and tap the plate to mount the anchor with bolts or just use self tapping screws of the right size.