He just want to maximize the power requirements for the whole accessories sir, i think for future purposes kaya nya kelangan big three upgrade, for the full performance, he don't want to wait goes headlight dimming before he act to do something, big three upgrade eliminate tension in the wires and provide less corrosion to the terminals, if you notice the original wires, its only for the installed accessories, so if you add something there, the tension on wires is present, big three is better than grounding kit, big three is better than adding additional battery or another power supply and also big three can also maximize the current cycle to the whole circuit without the tension or great resistance..