Where do you have your satellite radio antenna installed?

I'm gonna start off by saying that although of course, I can make it through a day without my satellite radio, I greatly prefer not to. Lol. I've been driving a Freightliner Cascadia the past couple years, and anybody who uses one of the tall satellite radio antennas, that need an object to "clamp" onto, knows that the Cascadia is hard to work with for those purposes, because there is almost nothing on the exterior of that truck, thin enough for that clamp to be able to grab onto. Best thing I've found to use on the Cascadia is a metal mount that screws into the mirror bracket itself, up against the truck body (as opposed to attaching the antenna to the mirror arm, which is too fat to work with). They sell them at just about every Love's, probably other places, but stopped looking after I got mine.
Anyway, I'm about to move into a new Kenworth T680. One thing that I've noticed just by glancing at other T680's I've seen on the road, is that it would seem from a quick first glance, to present me with the same challenge that I had with my Cascadia. Different style mirror arms, but still appearing to be probably too fat for my antenna to clamp around. I've noticed some T680's have thin metal hood mirror brackets. I briefly thought problem solved, I can put it on there. Until it hit me, that attaching an antenna, with a wire running into the truck, on the hood, which I'll of course have to open at least once a day...probably won't be to practical after all. Unless I want to find myself having to constantly strew out and reel in the antenna wire slack, every time I open and close my hood.
So what I'm wondering is, what solutions have some of you come up with to mounting your satellite radio antennas? I'd really love if somebody could give me a tip. Especially if somebody just happens to own a T680...or even a Cascadia for that matter, and I could perhaps copy the idea you've come up with. I have noticed a few trucks here and there with some sort of a window bracket/mount assembly, that they use to mount their satellite antennas on those, but I've looked around, and have no idea where to find anything of the sort.
Thanks in advance.

 

I tried the magnetic one outside before, but couldn't find anything it would stick to, on all that fiberglass. But I never would've thought to try it on the inside of the truck, because I was under the impression, it had to have an obstructed "view" of the sky. Thanks though. I'll break out the magnetic one again, and try it out in those spots, see what happens.

 

What's the part/area you're referring to as the "headliner"? As in the overhead compartment? I actually once had a different Cascadia, with the factory antenna included, just a wire that came up through the dash, and ironically, that was the one that has probably worked best for me, out of any I've ever tried. But like I said, that was on another Cascadia, and the one you're talking about would seem to be a factory antenna on a T680...?