siadinstance if one was started manually. To get Sia to pick up a remote instance, all you need to do is forward your local port 9980 to your remote server port 9980. For those comfortable with the command line, you can use the following command.
-fRequests ssh to go to background just before command execution.
-LSpecifies that the given port on the local (client) host is to be forwarded to the given host and port on the remote side.
-NDo not execute a remote command.