90 COP setup in a 94

[94allwheeldsm]

So I just aquired a 90 COP setup, i'm unsure of what brand it is but the person I got it from said it cost him around 450 I think. He was selling it cheap so I snagged it up. I would like to use the COP setup but unsure of how to wire it into my harness. I'm also unsure of how to run the TACH signal wire to my cluster/ECU. I know the Tach signal is the white wire, and that the tach may not work but I have another tach to wire up if I can't get the Tach signal to work with my Tach on the cluster. Does anyone have any ideas on how to wire it up? Thanks in advance!

 

[94allwheeldsm]

Update: Wire the black to black, red to red, and the other two wires(white and yellow) splice to the white wire.