I have a 2014 ram 1500 express and I'm replacing the seats with some Laramie, heated and cooled seats. My understanding is I need some harness from the original truck and to find a dealer who can update my build codes. Can anyone tell me if I just need the "pig tail" connector under the seat or if it's something more? Also, I'm updating the radio panel to add cooled and heated seat buttons. Is there an adapter I should ask the seller for? Thanks!