Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
This is all I can offer. Step one is to identify your model, meaning: compare engine- and framenumber to those listed here on p.4 http://www.honda4fun.com/pdf_parts_list/pdf_spac500-550/CB500-550_K3-K4.pdfThen go to the wiring diagrams here: p.182-4 https://www.classiccycles.org/media//DIR_1653304/DIR_1653404/DIR_1653507/ecc6759db0a214d5ffff8825ffffe41e.pdf to find out which scheme is applicable for your specific model. You could also check the last two pages here: http://www.honda4fun.com/pdf_libretti/500/CB500_550/CB500_550_09.pdf