Okay so i bought a JVC head unit for my BA XT wagon, and already have an Aux RCA adapter plugged in behind the fuxe box that i use for my phone, all i need is power for the Head unit as i can use the rca for my head unit sound so when i turn my radio to aux the head unit should work, could anybody help me locate power and the best way to tap into it? i have the facia kit from aerpro with the dual usb ports and have a jvc to iso harness already. just really need to know if there is a BA factory harness to iso that i can buy or can i tap into any wires through splicing