The manufacture tells me you have to pull the head liner off to do it, not much help there. I have not found any small wires or trail where one can feed wires through. I'll check the manual to see if there is anything to look for. Thanks for your input.
Then one other option. Is there a 12v wire running from the panel to the mast step for lights?
If yes, disconnect the wire from the panel and very securely attach a thin line to it. Then gently pull the 12v wire from the mast side, until the end emerges with the line attached. You now have a mouse line.
You can then attach the coax cable to the wire, and gently pull it back to the panel with the line.
If you want to take a few extra minutes, first pull the wire back, with just an extra line attached. That way your 12v wire is back first. And with the thicker wire out of the way, it can help the coax if the run is tight. With the two lines, you can then leave one in place for your next project.