If you simply ask yourself how this would be done, you should be able to reason out why it will not work. If you have two humans and you need to transfer some items that they own from one to the other and you are supplies only with the addresses of the two people but are not told which items to transfer or even what items they have, what do you do?
You could reword your question, then, like this...
I need to copy some files from one place to another but I don't know what the files are and are not allowed to specify them. How do I perform magic?
This is pretty much where you are. You want to move things from one place to another but you don't want to say what those things are. How are you envisioning that this would work?