The whole compound is as follows: Insert the original cable on the radio on the radio itself, at the other end there are two ISO connectors are now connected to the ISO connectors of the adapter. Then the other sockets of the adapter with the plugs that connect from the car stuck in the standard radio of the Auris. Now back stuck only the cable with the small plug for the remote interface in the corresponding socket of the radio, and everything is wired. In principle, everything just steckerei easily.
It worked with me right away, as long as you use the original cable which comes with the radio. I had, at first, an alternative, shorter, used cable from a third party (see my corresponding one star review), and thus there was promptly problems in the control of the four loudspeakers. I can really recommend the adapter and therefore full points.