OK I searched an read about the trailer wiring harness hookup. I NAPA actually had one in stock but when I tried to hook it up the plugs were square? not the same shape as the plugs behind the taillights. THe pins were the same. Now maybye I got the wrong plugs. I did't remove any panels just the taillights and peeled the foam off the connetors. Are there more plugs back in further? Like I said the pins were the same but the shape of the plugs were different. I just peeled the foam off the taillight plugs and tried to plug it in there. HELP?