CB Antenna routing

Trying to rout cable into the cab behind the rear passenger seats. I see a grommet on the outside of the cab but it does not seem to go through to the cab. I see some owners have routed through here but I can't see a path into the cab. Any ideas much appreciated

 

Go from underneath. There are a number of removable plugs that are easily accessible. Plus the plugs are easy to replace if you change your mind.

 

Thanks I will have a look much appreciated

 

Grommet plug just inside the door sill on passenger side rear. Pull up the sill to access your cable as you feed from the bottom. Cut a slot in grommet add silicone. Done.

 

Thanks much appreciated