No offense but if you have to ask how or where to put a port in for the phone, or any accessory for that matter, and you need it done soon (and right), you are best off to either have a dealer and or an independent mechanic install this for you. If you mess up an electrical job, it can cause you SO many problems.
But, if you really want to do it yourself, go buy an accesory jack (lighter plug) with a mounting plate, a fuseable link (very important) and some connectors to hook it directly into the battery. A few small rolls of stranded wire, and from there you have to kind of figure the best way to mount the plate (outlet) and run the wire.