Watch out with the little plastic balls. I don't trust them anymore since I used one at the spinnaker tack (pass a loop through the tack and slide the ball through): I saw it explode in pieces under load.

I now use a small dyneema loop I spliced. It took me while to get the damn thing right. It has a sliding eye on one side which is closing up under load, and a turk knot variation on the other side to get through the eye. Like the attached image (sourced on the net, mine is not that neat!)

All the rope manufacturer sell you those loops for a small fortune but explanations on how to do them properly are non-existent...