Having just done the charging mod described in the archive here https://oldskoolsuzuki.info/archives/tag/charging-system  I thought it might be helpful to others if I described how I did it with a few pictures.  I know some people find electrics daunting and a picture can be worth a thousand words.  First of all, however, just to make clear that all credit for the mod goes to jonny1bump who posted it all up in the first place, all I'm doing is showing how I carried out his work on my bike.