which is next to impossible to do unless you have something against the stick top while you push the acuator (square thingy) down on the stick, while you force the acuator down with one hand, slip the eclip on with he other, you dont have to get it on the whole way at first just enough to hold it until you can let go of the jstick and it doeesnt fly up in the air, then use a needlenoise plyers to force the eclip the rest of the way on.
hopethat helps.