pioneer ipod hook up

I recently purchased this off of Ebay http://cgi./ws/eBayISAPI.dll?ViewItem&item=370225563974 I understand how to connect it to the receiver. But in order to get power to my ipod to charge it, it says I need to connect the red power and black ground cable. what is the easiest way to hook up the power and ground cable. Is there a wire coming off the back of my head unit that goes to the amp that I should try to tie into? what about the ground? This is going into a 04 silverado. Thanks for the help guys. sorry I'm a newb and just dont want to screw anything up. Thanks again

That web address doesn't bring anything up, you should be able to get everything behind your stereo if you have already ran your accessory wire from underneath your steering column, I'm guessing you did if you have a after market stereo already installed? Check the installation instruction for the ipod cable it should just need the accessory power and ground.**advanced mecp certified

http://cgi./Pioneer-iPOD-Nano-iTouch-iPhone-Cable-CD-IB100-5V-A35_W0QQitemZ110455272302QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item19b7a5b36e here is the correct link. Wire came from Hong Kong, did not come with directions. What is the accesory cable? Certain color or where does it go to and come from? Just want to make sure the power shuts off when the truck ignition turns off like the rest of the system. Thanks for the help!

Ok so I pulled the dash apart and found the red wire with tag labeled accessory on it. I was able to connect the new ipod cable to it and then grounded the black wire in by using a self tapping screw into one of the metal dash bracket. Everything works great and now my 5volt ipod charges through the cable. It also quits charging when the truck is shut off, everything works great. Thanks for telling which wire to hook it up to I'm a newb and the cable did not come with instructions.