cb and radio antenna

[birdshill123]

My 1988 FC35 originally had 2 factory roof antennas mounted to
brackets on the goat rail. I have the right hand side antenna but the
left has only the bracket and the base. It looks like the right hand
might be the radio and the left side for the CB. Is that correct? How
do you access the CB radio . I removed the Wandersound dash and I can
see the wiring from the handset going to a connector. But it seems
like the connector goes somewhere under the dash? HELP

Thanks: Bruce 1988 FC35