By default QuickBox has compiled BTSync to make use of more secure directories within a users /home (this may be overkill and is a product of the way I handle business critical data with clients )
This method ensures that files chances of being deleted or otherwise remain at a minimum.
The folder marked sync_folder is the ordained location for housing files a user may want to process remotely.
Additional to this, the script leaves any of the customization needs you may require solely to you in terms of login credentials. You can set these values as such: