Recommend Demco baseplate and Air Force one all the way. Do you need the aux line? I installed, but usually leave the fuse out as I’ve never had any 12v issues. We’ve put in over 4K towing behind our bus and never had any charge issues, but as i said, my brake system is AF1, so no real power drain other than occasional brake/turn light power to run the led strip light i installed under the tailgate to enhance visibility..
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