1vicissitude

Okay so I found a avic-z1 for sale and pretty cheap but it does not include any cables or harnesses. I know sounds fishy right, but thats another issue I will address later. What harnesses or cables will I need to hook this up in my xb with the factory stereo? I've installed a HU four years ago but I really just cant for the life of me remember what is needed. I now a vehicle specific harness is needed but is there one that is supposed to link that harness to the HU? I'm just concerned abut the wiring, The fit kit and all that I can figure out.
Thanks
Robert