TV antenna cable routing?

On our 2022 TAB 400 BD I'd like to replace the existing whip antenna (mounted on the side near the roof above the Nautilus panel) with a folding WeBoost antenna and use the existing cable to connect the new antenna to the WeBoost electronics. However, I don't know where the existing cable goes. Does it go to the TV, or does it go to the Jensen and then that connects to the TV? I'd like to put the WeBoost electronics behind the TV. Thanks!