Go into N1MM config. Click on broadcast data tab. Check the spots box. Put the IP address and port. For me it is ( 127.0.0.1:12061 ) Then on SmartSDR make sure spots are enabled. N1MM spots should now appear on your panadapter.
Another nice feature is focus helper. Very useful for returning focus to N1MM window. In N1MM config go to broadcast data tab and check radio box. Put the IP address of your radio along with port number used in your SmartSDR radio setup. In SmartSDR go radio setup and click on radio tab. In the focus helper section select N1MM from drop down and make note of the port. Use this port in N1MM config.