I used a guide for a Note when replacing the fog on my Micra after it had an arguement with a badger at 60mph. From memory you need to jack the car up, take the wheel off and then the arch lining (be careful the clips on these snap easy!) and reach in the best you can.
I think there may be some bolts holding it in but I didn't need to worry about these as the badger hit it with such force that it sheared them clean off, so didn't have them to contend with. But that's the way you gain access anyway. Really bad design IMO.