62 wiring help. Convert to Alternator

[LuckyDSquared]

I have a bastard 62 truck and everything I search for is relevant to 63 and up I can only assume. I’m finishing up a swap from the original I6 to a SBC with a 3 or 4 wire alternator. My question is how to wire it up?

I currently have one larger contraption inside front of engine bay with three prongs, the top have the main positive lead from the battery, the middle has to be some sort of ground and has one wire that runs to generator, the third bottom prong and another lead from the generator. There are some smaller wire also installed such as a smaller wire from generator and one smaller wire that went to generator light on instruments. The smaller contraption below has three wires, green smaller wire that runs inside near the ignition switch (unfused) I assume is the horn signal wire, and a positive red wire from the larger contraption above it and one third wire I can only assume went to the horn (never hooked up and went to nothing when I got the truck).

One contraption is a horn relay and the other is the voltage regulator. All diagrams I’ve seen so far has four wires from generator and 4 wires to regulator. Also, the colors don’t match. Any help is appreciated. Even if somebody just has a 62 wiring diagram it would be much appreciated.