Animation retargetting

Hello so I have this set of animations.They work perfectly but I need to attach them to another mesh. Skeleton is the same. But I have this problem. I need to just rotate hand a little bit and it will be perfect. So how can I rotate it and I would save. Because when I rotate it in there it always goes back to the default position.

74493-untitledaff.png

Probably a bit late with this, but for anyone else in need of the info. You have to press the “Apply” key to apply an additive track to the animation. In this case as an example moving the left clavicle 5 units in “x” and pressing “Apply” applies +5 units in x to the whole(?) animation as an additive layer track. Correct me if i’m wrong.