Need some help

[osidesurfer365]

I am installing a Wi-Fi adaptor that will allow me to send whatever is on my iPhone to my I dash unit. I was wondering if anyone had a pic or knows the coors of the ground and accessory wire I need to tap into. Thanks for any help you can provide. Here is a pic of the device I am installing.

 

[osidesurfer365]

Here is a helpful diagram in case anyone is wireing anything inside. This is the black box under the dash near parking break. I found this very helpful for my wifi addition