The tow-rings for Mk-7 Golfs are different from previous generations.
The MK-7 has right hand butress style threads.
The Mk-6 and earlier (I think, at least Mk-5) have left-hand Acme style threads.
The tow eye lives in the tool kit with the jack. Since it lives under</b> the lug wrench and jack handle, it's not obvious where it goes.