From Steve Blucher @ DiMarzio
The red wire from the pickup is soldered to the white solder pad on the PC board.
The black pickup wire is soldered to green on the PC.
The green pickup wire is soldered to black on the PC.
The white pickup wire is soldered to red on the PC.
In addition, the installation direction of the neck pickup will have to be reversed if you want both pickups’ inner coils to remain on in the middle position. We don’t feel this is absolutely necessary, because the sonic difference isn’t very large. The difference is more obvious with the bridge pickup, but less so with the neck pickup because it’s closer to the middle of the strings, where the tone change isn’t as dramatic.