Honda Bali 50 – trailer there incl. Holm – which clutch?

Evening, I had bought a rather stable trailer for the scooter to transport a box of beer, or to throw away green stuff. That was already the holm, now I would like to know which clutch would be suitable for it? Can you do with the dimensions what? I think the ball should have around the 20mm, what stable clutch do you know? What about the Hebie F3? Unfortunately I don’t see an ID, so I don’t know if it fits?!