I've been into car audio since middle school, but this Slingshot throws me for a big loop.
I have a few questions! Your thread is very helpful.
So the thin wire coming from the alt isn't going to the battery, but to the starter? I was (today..) actually heading out to the garage to do a "Big Three" upgrade, and making a (fused) 4 AWG run from the Alt to the battery. Is that not necessary? Just alt to starter?
Also - is there any way to boost the alternator output from 13.5/6 to the normal 14+ volts? That 1 volt can make a huge difference in efficiency of the amps. Right now, with headlights and the radiator fan on, it'll drop from 13.5 to 13.2/3 which is ridiculously low to me. Thats not even when i'm cranking the music. I have two 4 channel amps and a monoblock for a sub behind the seat. Probably 2800w RMS total, but never actually cranking it like that, i'd guess 1000-1500w more realistically while playing.
*Edit:
I was just out there buttoning my rear deck back on and popped the hood to check out that wire. Where the hell does it even go!? I can't find it after about 6" it disappears into a void of wires. Mines a 2019 if that makes a difference. Still can't get over how thin that wire is.