Circuit board behind dash?
 

I just bought a 94 Davanti 241z and installing a new radio, I found the circuit card for the engine monitoring system and depth guage and noticed that the J2 plug on the circuit card had all the wires pulled out. Now I'm trying to reinstall the wires back to it and don't know what color wires go to which number on the J2 plug. By the way the guy who owned it before me should have never touched anything that had to do with wires. Can anyone help?