An electric connection plug (5, 5′, 5″) for an electric cable (3) for use with an electric terminal (20, 21, 20′, 21′) of a battery module (2, 2′). The plug includes a conductive fitting (51, 51′, 51″) engaged with a rotatable wheel (56, 56′, 56″) for selectively rotating the fitting to threadingly mechanically and electrically connect to plug to the battery terminal. The cable mechanically and electrically connects to the plug allowing rotation of the wheel and fitting without rotation of the cable while threadingly engaging and disengaging the plug to the battery terminal.