Guys, I was trying to buy a wiring harness connector for ECU for B500. The Allison transmission dealer gave me the very high price for the connection kit but after searching on web I find a cool place to buy the connectors for transmission wiring. Per my experience they have all connection made in kit form so you can just tell them what connection you need and they will provide you all components. For more detail visit www.transkittech.com Thanks Enjoy!!!