AEM adjustable fuel pressure regulator

[BenArtM80]

should be an easy question....anyone have a diagram/instructions for an AEM FPR? I bought one used awhile back, but I can't find anything (forums, google) on how the fuel lines should be connected. There are four ports on it (front, bottom, both sides), but I'm guessing I don't need to use all of them.

Thanks,
Ben