This product is mainly intended for the larger model (400) which was wrongly discontinued. Therefore, in the model 330 it leaves gaps on both sides of the connection so that it "flies" around cutting grass...
Also, the lawnmower with its circular operating method throws the cut grass not only backwards where the bin is, but also forwards, without the bin being able to collect it.
In summary, avoid this lawnmower and the bin.

I am coming back (after further tests) to urge you to avoid this design and functional failure as much as possible. If someone takes into account the purchase cost, the challenge of this particular company becomes arrogance.
Stay away