Trans 2 wiring diagram

I bought a Trans 2 from a guy and he said it would need new batteries and thats it. I purchased new batteries and when I tried to hook them up, it sparked really bad. I figured I had hooked them up wrong although I did go by the way he had them hooked and also by the markings on the cables. This is a 48 volt car and I really need a wiring diagram badly. Does anyone know where I can get one or does anyone have any idea what might have happened.

I need a wiring diagram for a Trans 2 as well. Did you ever get one?

I have not been able to find a wiring diagram or manual.