I found a disconnected female plug on my car but i cant find where it should plug in.. Its right at the back of the rocker cover under the intake pipework. Thing is its bright blue, a standard two pin plug, i just thought it was unusual that its not connected to anything? Its a two wire plug with one of those metal clips you can press in when you disconnect it. Most of the other plugs on the car are black, ie the one thats in the MAF, and the one in the N80 valve thing. Is this usual?