you can contact this seller FFD Hummer H2 Extreme Electronic Twin Cooling Fan Kit Get More HP More MPG | eBay on ebay and buy the harness that you need directly from him. I had a setup that I purchased through him (which I later changed out). but he has exactly what you need and you can buy it through ebay. or directly from him.

 

Does this compatible with my Kit?

Flex A Lite 31147 Adjustable 12V Electric Fan Switch | eBay

 

The Harness that was supplied with that fan setup included an adjustable relay.

 

If nothing was included as mentioned that kit should work fine. I had an old Camaro I put a Be Cool radiator in and flex a lite fans with that thermo kit. It worked great!

 

Great!!!! Thanks a lot guys!!!!