1-thanks for the tipsWiring from the head unit was not too difficult, I visited an audio shop and they had a wiring harness that fit perfectly for the Koup, so I did not even need to cut the original wires. I was surprised when the guy told me what wiring harness it was though... I do not remember 100% for sure, but I think it was a GM or a Volks harness that happened to fit perfectly..