Sensor. A protective cover, which is placed over the Battery terminals, to protect the terminals from dirt and debris. A Sensor used on the negative Battery terminal to measure the Battery's current to regulate a vehicles alternator output. Battery Cable Terminal End. Battery Temperature Sensor. Negative. Cable Terminal End. Current. Temperature. Terminal Protector. Negative Cable cover. Voltage. Included with: Battery Cable, Negative Cable, Positive and negative Cable, Positive Cable, Rear Positive Cable, Upper negative Cable, Upper negative Cable Order by application.