If in your case, all 4 cables are in red colour with black ring marks on them then connect the complete red cable to 1 and the red cable with single black ring marks on it to 2.
You can buy this TAE socket directly from the following online platform or from their stores:
www.bauhaus.info/innenraumser...
www.obi.de/video-zubehoer/obi...
www.hellweg.de/