Unused connectors are circled in red. For instance: tach light, throttle position switch (2
in second drawing), headlight flash, NSU optional circuitry (1
in second drawing), etc.
Edit: Uhoh, I wonder where someone else's photo went?
Rusty Rocket found it here:
nmerrill at DRRiders has added color.
Check out the green arrows and red numbers (bottom right), he's even added useful notes.