How to use AUX in the Ford Expedition 2006?

I'm on a road trip and I was wondering how to play music through the aux. I don't know if I have a connector or not for my iPhone.

The owners manual (see below) explains how to use the Aux option.
You will probably need a cable that have a 1/8th inch headphone jack (male) on both ends.
You can get these at any electronics store or superstore, and should be between $5-$10

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