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JK CB & HAM RadiosBulletin board forum regarding all topics concerning CB and HAM radios, the installation of them in your Jeep JK Wrangler. This would include antenna mounts, wiring, tuning and usage.
Yes, you are understanding correctly. 12AWG is bigger than needed but it will do. The factory plug on my CB came with 20AWG for the Constant, Switched and Ground. I connected to that with 18AWG.