no the prongs are inside the box section or the roof i have had the roof lining completely out as i had it re wraped profesionaly
and there is no acces to the prongs so can only imagine there are fixed in place
and as for the holes i will have them body filled and painted to match the car
so you will never even know there was holes there
the thing is the audi 80 is such a better car but it does carry the traits of the a4 so why not be different i say i have only ever seen this done once on a uadi 80 and that was in germany when i lived and worked there for a vw specialist
but thanks for getting back to me
charlotte x