Pick it up with the left mouse-key (hold) and move them into the right hand frame into the radio. Then release the key whereever you want to place it (at free place in the rig). Make sure that you still have the Copyright of HamSphere in your rig.
Sometimes it is a little bit difficult in the Editor, just try it again a few times.
73 and good DX from Jörg :-)
Bochum / Germany