What type of wiring setup should be used for 2 kicker cvr 12s and a 1500 watt kicker amp?

I have 2 kicker cvr 12s in a box to fit my truck and a Kicker ZX1500.1 1500 watt amp. I bought a basic amp kit with 8 gauge wire in it because i was clueless, but figured out that its too small. What kind of wiring setup would be the best with these subs and amp without messing with the alternator? If I had to do "the big 3" upgrade, whats the easiest way to do it? Is there a different way to wire it all up without having to do the big 3 upgrade or what? Please explain examples and maybe add a diagram or video to the sources also. Thanks!