[LXS]

Hey what's up guys!? Has anyone dealt with Dallas Mustang's tach adapter? I bought one from someone online, but he didn't have the installation instructions. I know what the black wire is for, but I have no idea about the red, green and white wires it has? I know one goes to the signal in the engine compartment, the other completes the circle/loop, and the other to the tach, but which is which? If anyone can help me out, I'd greatly appreciate, thanks!