Rockville RTR174 17 Foot 4 Channel Twisted Pair RCA Cable Split Pin, 100% Copper

I'm going to be installing this pioneer GMD 9605 in my 2008 Honda Ridgeline I got some speaker wire this is a 100% ofc copper and I've got um six RCA cables I don't have a sub at this time I got um let's see I got four of these right now on my doors so this is gonna power that and when I get the subs it's gonna power that as well I got this app install kit I think on eBay it's a hundred percent ofc copper it claims to be anyways and it seems pretty good and I got it for a very good price fifty bucks can't beat that as for gauge so yeah I'm also gonna be installing a voltmeter which is going to be connected to the amp and mounted on my dash so that I could see the voltage going through my amp make sure my battery isn't dying and here's my Honda Ridgeline in the garage this is my first time doing this by the way first thing I'm gonna do is unhook that negative battery cable so this is the