I am not sure the age of your Four Winds but according to the Quadra website, they claim to OEM Bigfoot Levelers for Thor. There are two types that Quadra currently makes; manual and auto.
The manual controller is wireless, and is about the size of a small TV remote. The auto system is wired, and typically I have seen the controller either mounted below the steering column or in a box with a cable under the driver seat that you pull out to use.
We were gonna have a set installed this fall, but we bought a toad and are spending our immediate funds on outfitting that for towing. We plan on having them installed over the winter though.
We live about 50 miles from the Quadra factory and they will put them on for us, which hopefully will work out better than having them installed at a dealer.
Using 2x10s as leveling blocks is getting old really quickly.
The only thing that works on a RV is the owner...