[John Mercier]

Originally Posted by sunset on the dock

Thanks all of you for your help. I found it. I'm now about ready to crawl under the sink!

https://resources.kohler.com/webasse.../1144560-2.pdf

Sorry, looking at the picture, I didn't pay attention to the fact you were using a a widespread. I should have thought of the retaining nut under the counter top as a way to tighten the entire unit up.