Electric fan install help.

I fired the fans up, they are very smooth, nicely balanced, and they move ALOT of air. Very happy with these so far. The controller comes tomorrow, I can't wait to see this little piece of art, hopefully I will have it in this weekend. I gotta say it is very wierd hearing the same electric fan sounds coming out of my 71 Scamp as my modern Avalanche, sounds just like it, but turn and look, and it's a classic! Very cool.