Watch folder is a useful folder in your seedbox, you can drop any torrent file in this folder and it will load in rutorrent. It is very helpful in situations where the tracker file size is more than 2 Mb.
Location of watch folder: /downloads/watch
To access it Open up your FTP tool and log in with your credentials, in this example we will use filegator
Browse to the watch folder in it as shown in the image below:
Upload your torrent file in the watch directory:
Once done the torrent will automatically load in your rutorrent.