This safety quick connect/disconnect connector kits are widely applied in various field This kits always are equiped in Electrcar folklift electric folk truck golf car tour bus and many other power-driven tools to solve the power-out problem The terminal pins are made of red copper coated by silver which has a strong electrical conductivity and can reduce the resitance to make the current and voltage stable The mark of positive and negative are printed in the conncetor to avoid the misplug In the kit a couple of boot caps are included to protect this quick connect and disconnect kist from the dust Very easy to install: 1Strip the insulation to fit the terminal pins 2Insert the cable into the ternimal pins 3 Crimp the terminal pins 4Insert terminal pins in housing with notched side of tongue next to spring 5Final adjustment Push contacts and cable into housing until the notched tongue snaps over end of spring; tug slightly to make sure contact is locked into place Package:4 connector ends 8 terminal pins and 4 rubber boot caps