Some filth broke into my car the other week and pulled out the stereo...unbelievably they took the front fascia, but left the stereo unit! morons. anyway, they kindly unplugged most of the wires, but CUT the aerial connection instead of unplugging it!!

I guess the entire aerial wire will need to be taken out and replaced? I've got the GTI bee-sting, so....
1) where does the aerial go once inside the dashboard i.e up the front side pillar, under the roof lining and then connects to the beesting? or somewhere else?
2) if (1) is applicable do I then have to rethread the new aerial under the headliner - thats sounds a right pain!?
any thoughts guys...electrics are defo not my calling..
cheers