I should be an owner soon and will be having the towing package added at the dealer. I understand that there is a plug under the dash available to simply plug in a brake controler, thus a do-it-yourself deal. Is this correct? There was a post here that hte dash needed to be removed to wire in the controler. What is correct? A plug in I can do, anything more and I'll have the dealer install the controler. Thanks all.