Cb cable questions

Hey all, have a few questions. Just got a new truck, there is no coax run for my cb. So I picked up some RG58 an antenna and the connector so my radio can run off my cigarette plug.

The antenna I bought only has a screw in mount type connector on the bottom. no where to plug the rg58 into. What type of connector do I need so I can connect the antenna to the coax? Any help would be appreciated. Would my local truck shop sell that connector?

 

Thanks Vol. No CB shops around this area. I just went back to the truck stop and picked up the proper mirror mount that had both connectors on it. It was 11 bucks. Appreciate the response.