i am just about to do it. but im little confused. do i have to use the relay to connect the horns(as in diagram) or i can just feed the wire coming off of stock horn and put additional ground wire and that's it? i also notice i only have 1 stock horn attached. im not the original owner of the z i own and did not know there was only 1 horn until it broke recently. hopefully the wire is still there for the missing horn. btw, i can't see the hella horn install page from robo's site. broken link perhaps?