These Proflow thru-panel battery connectors can be used wherever a battery cable goes through a firewall or other similar panel. They fit in a 1.25″ diameter hole and connect with a standard 3/8″ stud. Kit includes one red & black terminal. The battery jumper terminals allow a battery to be placed anywhere in the car. These allow access to the battery’s terminals without accessing any body panels. Universal for 6-36 V DC applications.