For the head unit Red = 12v+ accessory power, Black = ground, Yellow = permanent power for memory, Blue = amp remote trigger, White/blue = power antenna. Do not use 12v+ power for the amp remote trigger - it will roast it. Everything else is just speaker channels or RCA's - pretty easy. Hooking up a sub - take one channels' +ve connection and -ve for the opposing side channel to bridge it. Make sure you have the wire polarity right on the sub or it'll sound like crap (like any other speaker if you mess up the polarity lol) I would also make the Punch 12" sub removable for those times where you need the space. I'm using something like this so I can take out my 12" sub tube from the cargo are of my wagon -
https://www.ebay.com/itm/Round-Reces...MAAOSwGjtcu5Fd