First: Clymer/Haynes wiring diagrams are complete garbage, always missing things and usually with glaring mistakes. Example - if you look at the lighting switch on your diagram, you can see that it adds an alternator coil to provide extra power when the headlight is on. The diagram shows it connected with lights off and on low beam, disconnected in high beam. This is obviously very wrong.
I think you have the wrong handlebar switch unit for your bike. Alternately, your wiring is completely different from the diagram.
If it's the wrong switch, you can still use it. Just connect the extra black wire to a green in the harness (I would put some green electrical tape or shrink wrap on the black wire to identify it), and connect the yellow/red wire to your solenoid wire in the harness. The yellow/black can just be left hanging. You might end up with same-sex bullets to try to connect though, Honda generally avoids having power on male bullets and the solenoid wire, if the diagram is right and the solenoid is powered directly and grounds through the switch, should have a female... the handlebar switch for switched "start" power to the headlight and solenoid should have female bullets on those wires too.
You should check the small gauge primary wiring at the solenoid relay for the starter, if it has a black and red/yellow wire then it's as shown in your diagram. If it has a green and red/yellow wire then it wants power from the start switch, not ground.
Note that Clymer/Haynes diagrams always leave out the weird spliced wire I talked about in your other post. If you have a brown/blue wire not connected in the main harness connection jumble where the handlebar switches connect, you have to jumper it to a harness black wire for your tail light and probably instrument lights to work. Since you may have non-original handlebar switch clusters this is a definite possibility: even current new OEM clusters for bikes that need the spliced jumper wire do not include it, the original model-specific parts have been superceded with generic ones.