Hello,
We REALLY gotta' talk about jettisoning that toxic, heavy metal, inefficient loser of a selenium rectifier. There are far better choices in a modern, solid state, silicon rectifier that will run cooler and be worth nearly an extra volt DC at the battery - from Digikey and Mouser Electronics -- part number GBPC2504-E4/51GI-ND from Digikey --- less than five bucks. But I digress.
The green wire is ground and its eye connector bolts to the frame at a clean connection with no rust. The red/white stripe wire heads to the rectifier and has no fuse inline. The red wire heads toward the fuse (15 amp) and the remainder of the bike wiring harness. The other two wires coming out of the stator head to the rectifier and their position there does not matter for polarity.
You are likely new to the 90 CC bike world and you now must learn that a good battery that can accept recharge current is the voltage regulator for these bikes. Without a healthy battery, as soon as you rev up the engine, that extra juice coming out of the stator has nowhere to go. Every operating filament in every lamp on the bike will then burn very brightly but only for maybe two seconds. And headlights get expensive on these bikes.
Rick