Ive seen the downloads for the diagrams but none for the US Canada models. The diagram will show what leads on which coil pack to which specific cylinder they run to. By this diagram left bank black on green post , red on top black post. Right bank, green on green post and red on black lower post. Just for future reference.
But in the service manual it states as show in second photo different. Not sure if that correct or not can any confirm.
I have that book also but didnt see zx900b specific wiring diagram. Ill have to look again. The mechanics shop book i think its alittle better then haynes. I got the dyna coils that suck on coil wire leads. I like the cap screw like the factor. But they do now offer a coil with the screw caps on it. Just trying to make sure i got the 4 wires in the correct male terminals on the packs.