HI all

I have just bought a NRG thin quick release and a momo tuner and a momo boss, the car had a nardi steering wheel before, and the horn worked fine. but since i have got a quick release i can't get it to work. when i fitted the momo boss the black earth cable touched the metal on the boss and the alarm went off but when i connected the black wire from the nrg to the boss then connected the black wire to the horn button no joy but there is a yellow wire to on the nrg but i don't no where that goes to?

anyone help?

many thanks jay