I currently have an 08 touring model with factory xm radio. does anyone know if the existing antenna can be unplugged from the factory bose H/U and plugged into an aftermarket unit, for example the GEX-920XM? Or, if not directly plug in, maybe it is possible to splice the wire and connect it somehow? It seems silly to have to run and mount another xm antenna when the car already has a perfectly good one mounted in an optimal location.