For those using this GPS on the older wing, how does it tie in to the audio system without bluetooth? I presume a 3.5 mm female connector into the aux input male connector. If you are listening to satellite radio does it block audio input from the aux input? I had a Kennedy cell set system on my previous 2002 with a Zumo 550 that integrated everything. Just trying to find out if there will be an additional expense to make everything work together before purchasing. We prefer wired headsets, to save on the price of switching everything to bluetooth and not have charge the helmets often.