Alpine CDZ 7893 and IPOD ?

[Rob.]

I have an Alpine 7893 with auxilliary input. how can I hook up an IPOD to it ?
I found this pic from a website.

http://www.bortesi.it/images/interfaccia-ipod-alpine.jpg
http://www.bortesi.it/images/interfaccia-ipod-alpine-1.jpg