2016 FreightLiner Cascadia stock CB wiring

I'm looking for a wiring diagram for the antenna system.
1. I want to know where in the world the antenna actually is. I read on the Freightliner site that it's actually inside the body panels "for aerodynamic purposes". It doesn't say exactly where it is though.
2. I know what the type and quality of the CB and AM/FM coax cables are because they're easy to get to but I'd rather have a diagram so I know how the wiring is routed instead of ripping the entire truck apart to figure it out, and I'd like to know what antenna it is exactly.

Does anyone have this info/documents, or has anyone figured it out that will be kind enough to share the routing and location(s) and what antenna it is? I've looked on the FL site. It requires a login to access the manuals I don't have and probably can't get and I haven't found anywhere it specifically says what antenna it is exactly.

I also don't want to go drilling holes in the truck to run my own CB system, the diagrams if I can get a hold of them, will tell me where all of the access and routing points are.

 

What seems to work better? Installing and using your own? I was considering getting the 980ssb but saw the Cobra 29LX on sale for $80 and couldn't resist so that's what I have and it works good enough with the factory wiring and antenna. My concern is...how long will it work on the factory stuff? I'm aware of the junction box and how it's set up. I don't think that's very efficient, just cost effective for Freightliner to do it that way. Will I get more range and better reception/transmission if I install my own antenna and coax? I think it will but don't know for sure. I'm also going to be getting a new 2019 truck (from the company) within a few months so that's making me hesitate installing my own right away. I'm not sure I want to yank it all out and put it in the new truck in a short amount of time. As the title says I'm in a 2016 now.

I'm planning on getting a 3000w antenna and the best coax cable I can find. Surely the stock antenna is not a 3000 watt...or is it? If it's really the "Film Antenna" Slowmover's post mentions I'm amazed my radio is picking up anything outside of the parking lot...and I really don't think it does have that long of a range. I have picked up conversations a mile or 2 away that were loud and clear but I think that's because I was on the peak of a hill and there were no obstructions in the way of the signal.

Is the stock antenna really that crappy of an antenna? A yes answer wouldn't surprise me.