Currently have a Big Tex single axle trailer and im looking into buying a enclosed dual axle trailer with electric brakes. I dont think my 04 F250 is wired up to support a trailer with electric brakes because it only has two smaller electrical options. IT has the 4 prong and a small circular connections and i currently only use the 4 prong with my Big Tex. What do I have to purchase or do to have my truck set up to pull the new enclosed trailer??? About how much will it cost to wire it up with the right connections??