This is an Earth X battery accessory. The 12V LED battery accessory has a built in resistor. This makes for an easy installation and compatibility with a 10-15V electrical system. Details installation directions are located in the Earth X manual but it is very simple. To install, connect red wire to a positive bus connection. Then, connect the black wire to fault monitoring wire (also black) that is located on the Earth X battery.
Connect the positive wire (red wire) of the LED to the electrical bus (12volt positive), typically to a fuse/breaker downstream of the master switch. Connect the negative of the LED (black wire) to the fault monitor wire (wire out the side of the battery) of the battery.