Here is how I have my cb Radio set up. I took these pictures before I put my radio in, but it should help explain anyway. First thing I did I just Wax the spot really well were I placed my antenna on my roof, right in front of the roof rack. I then zipped tied the coax line to the roof rack, (no real reason to, but just to get it out of sight a little bit.)
Then after running the line through the top of the door jam I was able to tuck the coax behind the weather stripping all the way to the bottom of the door jam, and brought it back in behind the passenger seat. I placed my cb radio on the passenger side, mounted on the center console. After running the coax under the passenger seat, making sure it doesn't rub when you move the seat, I just tuck it under the center console and connect it to the radio. Then I just wired my cb radio to use a 12volt accessory plug, So I can move it in and out of my car easily if I need to, and thats it. If I ever find my camera, I'll post some pictures of it.