CB radio

I have an older CB radio hooked up to a PA speaker. The microphone had a loose connection so that when I would wiggle the cord, it would switch between the sound coming out of the PA speaker, and the external speaker on the bottom of the CB radio. I opened the wire and soldered the loose wire back, now the sound always comes out of the external speaker. Does anybody know how to fix this?

I figured I'd post this here since the Radios and GPS forum on here is dead, hardly any posters.