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If your Tour-pack as a power point you can purchase a cheap Bluetooth - FM Transmitter. Tune the radio to the desired frequency transmit from your bluetooth device and it will broadcast over your radio, all while completely hidden in your Tour-Pack. You can try something like this.
I put one on my 13 EG this spring and I really like it. I like being able to use my handlebar controls to change songs and not having to mess with wires or recharging the Bluetooth aux plug-ins. I just drop my phone in my windshield bag and go. Yes it's a lot more expensive than an aux cord or the plug in BT receiver but I'm glad I got it. I bought it from jet.com and got a discount for 1 of my first orders from them so it was $145.