Youre the man. Things are getting alot clearer for me now.
So theoretically, i could swap the lighting coil for a 5a charge coil, double check the rectifier can handle it, if it clears then i can run the red+green to my battery and then build a nice power distribution box to hook my lighting too??
The Only rectifier I've seen or had that couldn't handle a swift kick of 40A has been the Kohler ones for riding mowers.
I currently use a GN200 rectifier on my cow, but there's not much of that thing that isn't either pure custom, repurposed, or heavily modified.
I wouldn't worry about the rectifier being able to handle it or not, it appears to be the same generic China unit slapped on everything with a GY6 or clone engine. It can handle more than you can or at least would be willing to personally thow at it.
5A is the bottom barrel variety, and for the direction it appears you are going, or may eventually go it's going to be worth getting something bigger than 5A if possible.
Don't piss about with any single coil crap, get a parallel one if possible.
Worst case scenario get a pair of singles and modify them to be full wave parallel
To do this you simply pull the frame ground connections off (always the wrap starting point) solder a 2" 14ga wire to one of them.
Desolder (cut if crimp connected) the tail wire from the other and resolder it to the other open ground, then that 2" line you added goes to where you just removed the outbound line from and you now have a full wave parallel coil stator that should be able to output a lot higher.
BTW They call them parallel because they run parallel to each other 180° apart, they are electrically connected in series.
The full chain of command would be stator>VRR>battery>distribution>system
All grounds back to frame beginning with the battery negative terminal, this saves a whole F★CKLOAD of wire as well as electrical problems later.