It isn't the original system, they redid the entire thing.
Scroll to page two of the newletter at this link
http://homepages.cae.wisc.edu/~vehicle/newsletter/QCFall2005_internet.pdf
It tells the whole story.
This is the first time that I have ever heard of a working EV1 being in the Midwest and I am really looking forward to checking it out, even if it isn't "original".