If you really need them you could do an FM modulator and install your own jack on one of the switch locations. There seem to be plenty available. I've done this many times where people wanted to plug in portable MP3 players. However, if they are really thinking, they would have Rockford build in the capability to interface with their hard drive system. I doubt it though. You overpay for all that stuff anyway. It's better and cheaper to go strait aftermarket.