I'd been browsing audio systems online and thought about getting one of them eventually. But, we were at a dealer today and they had a demo of the Harley Boom Cruiser Amp/Speaker setup (76262-08 in chrome.) With 20% off for a special event we went ahead and ordered it. But, the concern is that I have a 2004 FXDWGI. The fitment states Fits "'04-later XL, '10-later FXDWG, '00-later Softail®, and '99-later Road King® models." In kicking it around with the parts guy, the thought was that perhaps that it just wasn't "plug and play" and that it could require tapping into power, etc. So, the big question is, *why wouldn't this get the official nod on a Pre-10 FXDWG?* I'm hoping someone may have an idea. Thanks in advance!