The antenna is in the glass, there are two cables coming off that go in to the AFM(AM/FM Module) then two more come out and continue along the headliner, all the way to the front in the dash where the antenna signal is received by the tuner and processed, the RDS info is decoded, and the signal is routed through the DSP and out through the speakers. The connections on the back of the tuner(which is most likely in the front on all audio systems) are just standard antenna cables, as the signal is just a standard antenna signal. This just transmits a stronger signal over top of the signals coming through from the antenna. If I can find one here in town that I can just return if it doesn't work, I'll try it ASAP.
Some dude from Dension founded DICE(probably to escape the bad rap Dension has gotten with their flying circus we are all familiar with) DICE also offers a MOST compatible system, but its for Benz and Porsche right now. Volvo = NEVER. Don't even think about holding your breath. I'll believe it when I plug one in to my car and it works properly.