Does anyone have a wiring diagram of the factory wiring harness that connects to the OEM Factory subwoofer for a 04 X5 4.4i w/NAV(Non-dsp) ?

If I have Navigation on the car already, do I need to get a whole new wiring harness to do a DSP upgrade?

Can someone send a pic of where the wiring and harness might be located in the rear right component. I found a wiring harness under the spare tire, but the connector doesn't seem to fit on the sub, I'm not sure if thats the connector. Any help would be appreciated. Thanks