Hello Sn_a_ke,
What you are actually looking for is called “Animation Retargeting.” This takes one skeleton and retargets them to the appropriate positions of another.
Here is some really helpful documentation on how to go about doing this.
Animation Retargeting Different Skeleton
https://docs.unrealengine.com/latest/INT/Engine/Animation/RetargetingDifferentSkeletons/index.html
Animation Retargeting Same Skeleton
Hope this gets you on the right track!