To connect your Coros sports watch as a heart rate sensor to the Garmin computer, you need to check whether the Coros watch uses Bluetooth or ANT+, as the Garmin computer supports both transmission standards. If your Coros watch is compatible with one of these technologies, you should be able to connect it to the Garmin computer to transmit heart rate data. Be sure to consult the specific instructions for your Coros watch and Garmin computer for the exact configuration steps.