I got mine on ebay but the copper disk bit that goes behind the wheel wasnt with it, the horn wire goes to this so you can use the horn push on the wheel. So i ran the horn wire to a simple push switch on the dash.
you can see it in this pic where the rear wash/wipe switch would be if i had one.
you have to let the MOT man know it's there or it will fail with him pushing the wheel horn thinking he's a bit mutton lol
Ok thanks, no idea if the copper ring is there but a push button for the horn elsewhere isn't a problem i just can't get used to the thin standard micra wheel