Copying/Importing animation from one take's Base Layer to another take's Anim Layer


I am pretty new to MoBu, so I am asking advice on an issue I am facing.

I have two anims of the same rig(let’s say anim A and anim B), both in their own base layers in 2 separate takes.
I want to use Anim B as an override layer on top of Anim A. How can I copy the animation and place it as an anim layer?

I know we can only copy Base to Base and Anim to Anim. Is there any way to solve what I want to do here?
Any leads will be really helpful!