Attach Rebar to Concrete Element

I have some rebar elements that are attached to MicroStation Solids.  I have converted the solids to Concrete Solid elements.  Now I have MicroStation solids with rebar and ProConcrete 3D elements with no rebar assigned.  Can I reassign the rebar to the ProConcrete 3D element rather than the MicroStation Solids?

Or can I copy rebar from one 3D element to another?

Thanks for any help.