Unfortunately I don't know how to translate the recipe to windozee, a language I don't speak very well ;-)
Okay. First, you need to add a custom set name to the hot key menu to create the settings folder you are going to move thee files into on the new Mac. In Mac, the files are located under User>Library>Application Support>Capture One>Keyboard Shortcuts. In Keyboard Shortcuts you copy the custom.plist files in that folder into the same folder on the new system.
Hope that helps!