Thanks for the reply but the bus has been repaired and has left the shop. Right now I am unable to ge the VIN #. I guess basically I was asking if there was a generic wiring diagram for this "round plug" so that it could help somebody else out down the road.
The wall chart ES3213EN: 1000/2000/2400 Wiring Schematic Wall Chart is availible from allison publications for about 250.00. For a few more dollars you can get the whole trouble shooting manual from the same location or an Allison certified rebuilder near you.