Then you didn't study them hard enough. Every single book mentioned above has some very valuable information, you have to know what to look for in what manual. Most early Honda FSM's are based on pre-production models where the pictures give a wrong idea of what it looks like at your bike. Take for example the FSM for the CB450 K0, they show pictures of different !! pre-production bikes, all in one manual. It's even worse in the manuals of earlier bikes, such as the CB72/ CB77 or the early dreams. A CB72'61 is a different bike in many details then the later ones, but most pictures show the pre-production model of the CB72'61. Don't get me started on early dreams, it's even worse.
But yeah, color wiring diagram.
The electrics on these bike are very basic, you really don't need one if you understand why things work, but most electrical questions come from people who don't know the physics behind it, they just want to know how to connect to what. When it comes down to cable routing you need all the pictures you can get out of these manuals, including the FSM, and yes sometimes they conflict, and sometimes the FSM is right, and sometimes it's wrong.
I hardly ask a question on any forum, including this one. Asking questions means you just want a quick answer without going through the process of analysing it yourself, not learning anything on the
why question, only the
how question.
Many people could benefit by reading in, for example on Glenn's Honda two cylinder repair and tune-up guide, but also Honda Motorcycle Common Service Manual, before asking questions about the basics.