The copper lugs must be crimped on the welding cable. There is a preferred cable: this is one with very many very small wires. This makes the cable more flexible, and therefore, easier to bend into a cramped space. Luckily, the cable from Revolt-evc.com, recommended above, is this type. The cheapest crimper is a "Hammer Crimper". Electromotive sells one for $35.00. EV america.com rents a real crimper. This company is run by Bob Batson, maybe the #1 guy in electric cars. I bought a hammer crmper for $18.95 on ebay. He has plenty more. The seller was "super-genious", at e-mail:
mark@sunmarcinc.com