Just a FYI. Both of the dins are not for aux in one may be but the 5 pin is a 2 channel low level output and amp remote wire if I'm not mistaken. I have built a din to rca adapter for one that ran an aftermarket amplifier powering subs with excellent result. You can test it with a DMM or test light. With the radio plugged in connect the dmm or test light ground to the chassis of the car. Probe the middle pin and turn the radio on and off. If the dmm or test light shows 12 volts when u turn the unit on and it goes away when the unit is off that's your remote turn on. The other 4 pins should be your 2-channel output. Left +/- and Right +/-.