With some parts from a local welding supply store, I replaced the cable and insulated the motor terminals.
After a very short test, we had more sparks and smoke. Despite my best efforts, I could not fix the motor. We parked Electro-Willys and the Juice Box with all the "left behind" vehicles. Follow Mike and the E-W Crew's adventures with the AC'12 Convoy at Ellen's blog.
A month later, we picked up Electro-Willys, and emptied The Cave so that we could haul Electro-Willys back home. We had a good trip, but it was not the adventure we had hoped for.