Thanks to Collin Kidder to start with as well as the hackaday site.

 Here is the github code link: https://github.com/collin80/TeslaBMS

And here is teh hackaday link : https://hackaday.io/project/10098-model-s-bms-hacking

This shows the modification to the Tesla BMB that I have made to eliminate an external level converter. It works. This diagram is originally from the Hackaday site.

This is the 16 pin chip on the Tesla BMB board that by pulling pins 9 and 16 and then connecting them both to 3.3 volts you can drive the battery pack directly from the Arduino Due

Stay Tuned.