Hopa Plug Installation Help

I have a Hopa adapter plug in front of me that I want to connect to an AFN engine. Unfortunately, I don't have any instructions or documentation for it.

A thin black cable extends from the plug. Where does this cable connect?

An der Gerätehinterseite befinden sich 3 kleine Schlitzschrauben, die so eine Art Einstellmöglichkeit sein könnten. Ri'Is that correct?'

Best regards, caddy.