Go to the Output tab and select BoxCast under Platform.
Next create an RTMP source in the BoxCast Dashboard and call it ATEM Mini Pro.
Once created, copy the Stream Key and enter it into the Key area of the ATEM.
After you've connected your cameras and audio to your ATEM, press ON AIR either in the ATEM Software Control or on the ATEM device to begin streaming. As long as the ON AIR does not start blinking, you are sending the stream to BoxCast. A good way to double check this is to click on the Sources tab in the BoxCast Dashboard, and make sure you have a "Connected" green dot.
If you have any other questions about hooking up your ATEM Mini Pro to BoxCast, reach out to our Technical Support at email@example.com.