Hi Seth,
I’m a tech moron but I’ll give it a shot. I listen to my iPhone music via bluetooth from my phone to a set of ear buds. I find music better to hear that way than playing it thru the bikes speakers. To do that, I connect my iPhones bluetooth to the earbuds. If I want to listen to my iPod which is connected to the USB in my saddlebag, all I do is press the AUX button on my bike’s radio controls. But, you first have to disconnect the bikes Bluetooth, Electrical Connection, on your phone I think. Make sure the Mute button is not pressed as well as turning the volume on your iPod all the way up.

You can then use the buttons below the volume button to change tracks on the iPod.
Not even sure they’re called tracks anymore.