We also have an Isabella Magnum, which ever type of awning you have, most wheel arch covers don't have anyway of fixing them to the caravan side above the wheel arch without sticking on the press-studs or screwing a fixing point which may well invalidate your caravan warranty. The easiest way is to purchase the rubber suction cups, from most diy stores and hardware stores, I found the type that have a small loop hole on them so I could sew them to the wheel arch cover and simply by wetting them, they stick on easily to the caravan wall. Hope this helps!