79 c10 electric fan relay to ignition switch help?

[c10Sleeper]

Hi i just recently bought a be cool radiator with dual electric fans they come with everything i need to install including directions. In the diagram it say gray relay wire to temp sending unit I understand that but the green relay wire is suppose to go to the green ignition switch wire. I cant find that wire under the dash there are green wires but i think that's the green and blue wire for turn signals and purp and yellow for signals. Any help would be appreciated and pictures eould help alot more thanks
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