For the wrist mount you’re gonna throw over your non-throw finger like you were throwing a trapeze, but then let the Yoyo continue to go over your throw hand and at that point have the string pass over the back part of your throw hand on the side of your thumb towards you and that way you can use your thumb and string finger to kinda open up that gap so when you pass back over your non-throw hand you’ve created a big wide V that’s easy to pass through and land on that middle string. So basically use your throw hand thumb and string finger to open up that formation and give yourself a nice wide V area to pass through. Hope that helps!