Yes. You can determine that by the HW ID and then see what Bus it’s on. It’s the 1st thing I looked at to make sure you had the external one as Priority 1. And you do with others disabled. So far so good there.
The question about hard mounting is kind of loaded. Many will say, including the Cube manufacturer, to hard mount it but there is plenty of anecdotal evidence on the forum here that with some craft more isolation is needed. But everyone would agree that adressing the source of the Vibration is a primary goal.