Here is a BGW thread that you will want to check out:
http://www.buggiesgonewild.com/elect...resto-mod.html
Also check out this one:
http://www.buggiesgonewild.com/elect...ial-truck.html
And this one has possibly another source of manuals that you will want to check:
http://www.buggiesgonewild.com/elect...ification.html
Also find attached photos of the manuals for your cart. At one point, these were available on ebay.