Hi, just bought myself a fiat stilo 1.9 jtd with sat nav, i'm trying to hook up a subwoofer and amplifier. problem is the remote wire from the amplifier, i can't find anywhere to place it on the back of the original headunit, i've read the manual for the amplifier and it says to connect the remote wire to the accessory ciruit. can anyone tell me where it is located and how to connect the wire. cheers.