Whatever method you choose you gotta start by securing it in something(pot/mount). It should not be moving as this may prevent root development. Get is securely fastened to something and you might see some growth. Since it is arealdy in open air I would say mount it. Not having roots could lead to rot at the base of the plant is you put it in a medium that maintains too much moisture. I think whats important now is Humidity, Stability, and time.
Whatever method you choose you gotta start by securing it in something(pot/mount). It should not be moving as this may prevent root development. Get is securely fastened to something and you might see some growth. Since it is arealdy in open air I would say mount it. Not having roots could lead to rot at the base of the plant is you put it in a medium that maintains too much moisture. I think whats important now is Humidity, Stability, and time.
If you look at the picture, it's already being attached.
Otherwise, good point!