How do I properly connect weld cables to the output terminals?

Stop the engine before connecting weld cables. Remove the supplied nut from the weld output terminal, slide the weld cable terminal onto the weld output terminal, and secure it with the nut so the cable terminal is tight against the copper bar. Do not place anything between the weld cable terminal and the copper bar, and make sure the surfaces of both are clean, as improper connection may cause excessive heat, fire, or machine damage. (Page 21)