The 'interface connector' is (almost certainly) a serial control port, not a video output. LVD stored composite analog video, so there are no chroma or difference signals available to assist in digitizing the video.
Figured it out.
Hold Ctrl and yellow points will appear in the middle of connections.
Click on one where you would like to create the reroute.
You can now move it around and connect nodes to it.
This apparently works on "arrow connections" only, which makes sense.
You can also use the left toolbar (or throught a node - right click) and under "Other", ...