I bought a car that had the sph-da210 installed. I got my iPod classic hooked up but would like to use some of the other features. I know I need a few parts to hook up my iPhone to the unit. My question is how do I hook up both? The older pioneer products you were able to daisy chain each accessory to have access to everything. I thought about adding xm radio but there is only one plug on the back. (It’s the black one right above the green gps antenna plug in)