Replacing plugs for the Computer

I have a 97 XJ with the 4.0l that was wrecked. Two of the three plugs that plug into the computer need to be replaced (the black and white plugs) the gray plug is fine. I have the replacement plugs, but my problem is, I am not sure which wires from the engine wiring harness go to the white plug and which ones go to the black plug. Any help on this would be greatly appreciated

~Mark

Isn't that harness sectional ? try a boneyard and see if you can find the front section.