Go to a stereo store and have tem make up and install a custom wire kti for $40 installed. with gold connectors and 0-1 or 4 gauge wire.
Any cars newer than 5 years is useless, it will not make more power.
Hell it won;t make any power , think of it as maintance for wear and tear parts. The cables break down from heat cycling from the engine/current and enviorment. This increase the resistance and reduces your power. You don;t maek anythign you never had before that is a bunch of Bull. I felt a great difference after putting a new yellow optima with new battery grounds and starter wires +batt terminals. Starts way faster as you can hear the starter spinning better.