Combining Motor6D and Bone

How do we add a HumanoidRootPart to humanoids rigged in blender. So the humanoid does not have motor6D joints, they have bones.

In order to move humanoids, I’m guessing we have to add a HumanoidRootPart. Do we add the HumanoidRootPart in blender or in studio? And how? Is it possible to combine motor6D and bones?