To link using FeelConnect, you first need to open a browser (e.g. on computer) and go to POVR, and find the QR code. Then with FeelConnect on your phone, either scan a QR code as shown in the browser, or enter the code which sits below the QR code. That way you make a connection.
When using API Mode, there's no option to see the QR or get the number code.