just picked up a ipod2car to install on my 04 with the bose stereo and NO XM. there is no instructions with it and cant find anything on their website, so do i just hook up the positive and negative to any power source and then put the plug it into the back of the head or what? do i have to unplug the big connector already there? Sorry if this sounds stupid i but i only want to do it once. any help would be great.