EQ6 series 700 small board where

Hello all.
I'm new here and hope you can help me. I recently bought a Siemens EQ 6 series 700. It does not make milk foam and I wanted to see the ceramic valve. Housing side in the direction of electronics opened and there was a small circuit board where a three-wire cable white / brown / red is plugged. Is only a through board where on one side 3contacts are where the plug is plugged and on the other side also only contacts. This board must belong somewhere. Does anyone know? How to insert a picture here I do not know yet.
Greetings Norbert

Hello to all.
Settled. The circuit board sits normally behind the front and is needed to retrieve the technician's data. Sits behind the torx screw that holds a small cap and the front panel. Have moved it back to there.