My 78 Vette PC has two coax cables going to it, one for the radio, the other for the CB. My particular car has the connections on both the front and the back of the mast tube. I just got a new much better tower/antenna assembly. The connectors are a bit different than mine. Which connector goes to the CB and which one is for the radio. This new column has both connectors on one side, one below the other. I have no idea which connection is for the CB? Anyone know about this.. This antenna is clearly for a Chevy CB/AM/ FM antenna, same as mine except for the location of the connectors.

 

You will be asked for photos of this new aftermarket (?) antenna

 

I would experiment to see which plug would give you the best reception. The best way would be to get a SWR (standing wave ratio) bridge to see what plug would give you the best reading on transmitting a CB signal. If you know anyone that is an amateur radio operator (ham) the SWR meter is a very basic piece of equipment.

 

It's not after market. It is just a different plug lay out than what I have. The antenna itself is correct