I'm assuming you are talking about Street Fighter II Champion Edition since those commonly came in Zback cabinets.
Street Fighter games are typically it's laid out like this, with top row buttons 1,2,3 coming from the jamma harness, and the bottom row is laid out with buttons 4,5,6 these are usually coming from a kick harness, occasionally button 4 also comes out of the jamma harness instead of the kick harness, but the control panel layout is still the same.
Hope that helps you.
Yes this helps me alot. This will help me wire the buttons up to the harness when I get the stuff to go into the cab. I am rewiring it from a light gun game to a fighting game. So the CP has only the player one and two start buttons(that I will be replacing with new ones.) Am thinking about making it a street fighter game if I can find a cheap board for it.