Spot on - when you take the grilles off all becomes clear at the back of them, just be real careful though - I snapped loads of the clips on the back lol! But it still went back on ok thankfully!
It's a good idea to to take a look on eBay as well and pick yourself up a second set of grilles, that way you can swap and change depending on your mood! I pycked up a grille set for mine for next to nothing, or should I say, at least tens times less than what Audi Parts were going to charge me!