I Just want to clarified something. The Red wire from Rectifier goes to positive port on the battery and the black goes to the negative port on the battery NOT the frame. Correct?
Yes. To follow the flow. Energy is made in the stator/AC generator. That creates AC alternating current, on the white wires. The white wires go to the Rectifier. The Red wire goes from the Rectifier to the a line that is connect to the batter, and then goes to the fuses.
The negative side of energy, aka the return path. is a neg on the black line. The black line is grounded in 3 spots I can think of. Battery post neg, same line on the engine, and then next to the battery, under the seat its under post there too. Make sure all 3 spots have fresh clean, not corroded connections for the best ground.
black goes to the negative port on the battery NOT the frame. Correct?
Not entirely true. Keep with me, The black wire gets to the battery, eventually. The Wire harness grounds out at the post under the seat. Then the frame becomes a negative pathway for the return power, which ends up going though the engine, to the ground strap, to the battery negative post. Notice there should only be one connection on that post. (neg post)
(I didn't mention the turn signals, they just ground out at their respective site.)
Did that answer your question? I couldn't answer this at work,just cause I needed to verify the wire diagram. The wire diagram is that for the 81 SH model. Good luck