Sure np, first you go into the animator layer Base Layer -> Locomotion -> Free Movement. Once you are there you will see the blendtrees. Right click on Locomotion and select "Add Blend Tree". You will see the new Blend Tree show up. Click to highlight this blendtree and then in the inspector panel you can rename it to whatever you like and add your motions to it. In the motions is where you add the animations that you want to use when the moveset id is used. Then just set your right hand attack weapon to use the new moveset id.