Anyone familiar with simogeo Filemanager? I would like to use it for simple text imput...

Hello,
I'm not sure if anyone is familiar with with the simogeo Filemanager but my objective is to simply use it to get a file url into a textbox. https://github.com/simogeo/Filemanager
I've been able to use it with CKEditor, FilebrowserImageBrowseUrl="/FileManager/Default.aspx" and it pretty much does the work for me but
how can I get it to grab the file's URL upon selection in the editor and then apply it to a textbox?
The idea is to put an image sprite next to the texbox and then open the manager. When selecting the file in the manager, the file's url should appear in the textboxt.