The mounting on a ceiling is the most flexible and cheapest possibility of assembling the Nonomo®. You can fix exactly where you like e.g. ABOVE your couch ABOVE your bed.
Use a percussion drill to drill a hole with a diameter of 12 mm. Insert the sent dowel into the hole and screw in the eyebolt until the thread is no more visible.
Just screw in the sent eyebolt in your wooden beam. There is no need of using the dowel.
Please consult an expert for professional mounting.