Incidently it took me a while to work all this out and is easier to show you how then to write it down.
Parrot want you to buy the kit and then the adapter from them for the iso to manufacturers loom which makes this easy.
But as most Cellular suppliers dont stock them- they stock the audio lead adapters (which no one orders) you have to splice it all together yourself.
Which not everyone knows how to do properly- as I say it took me a while to sort it out properly.
Jake