I think this is very good....

Williams Blackout manual.pdf

This file is also very good.
It's for Firepower, but Williams used the same wire order on all games.
I just check for the solenoids between Blackout and Firepower and they match.

Williams_System-6-7_Driver-Board_layout.pdf

Yes, the wires should have the same colors.
Don't look at the assingment of the wire.
Look at the wire colors.
You can always folow the wire to their source.
The Special solenoids (pop bumpers and slingshots) are always in the same place, the upper left section of the driver board.
The assigned transistor may vari.
Time to learn to read schematics.....

I think I misunderstood you.
I though you had all the connector wires cut in the backbox.
I never thought about the wires at the coils and switches themself.
Sorry about that...