it comes from from the service manual. Search for service manual on this board and you can DL a copy of the iso image
I kind of assumed that if there were such manuals or diagrams available, they would be everywhere by now. Having owned Suzukis for a number of years now, I know what a tight lid they keep on digital copies of any type of manual.G-Dub,
There is no entire SM as far as I know. One poster said he had it but it was the Owner's Manual.
Another poster cracked open SM the front door via the Dealer Entry, but that didn't allow much other than a b & w page or two.
Those wiring diagrams are the exceptions that they are in colour as the Tech's wouldn't like b & w for wiring info.
It only worked using Internet Explorer as well, and I couldn't print the page or diagram.
Suzuki encrypt the online version and the Dealer pays a fee per nominated employee (on a submitted form prior to Suzuki) to get the de encrypted view password to use on the workshop PC.
Holeshot408 has another thread reply here on the service manual.