I have a 97 12v supposedly with factory tow package. I have 2 controller harness' 1 came with the truck, 1 came with my tekonsha. Both have the same plug. The problem is that the connector under the dash doesnt match the plugs, the one under the dash has about 12 conductors and looks kinda like an IDE drive connector, nothing like the factory supplied pigtail; Where exactly is this "blue" plug everyones telling me about?