There are countless variations out there. I have used a system that used small carbiners to attach to the trapeze dogbone and that worked well (and didn't attach directly to the sailor). I've also used a system where we tied a short tail with a stopper ball to each side of our trapeze harness. The chicken line had the prusik knots but terminated in a spliced eye. We would simply put the spliced eye around the stopper ball to connect in. It was very easy to undo but it did add another connection point directly to the sailor.

That advantage of the stopper ball system is that there is nothing banging the leward hull but the eye-spliced line.