Unable to connect the connectors of the newly part created

Be less astonished Get and learn to use the FritztingCheckPart tool. It did most of the grunt work. The rest was just a bit of experience with the way parts can be broken. As the diff showed, the actual fix was to delete 2 legId references, and add 1 breadboard reference. It would have worked without the breadboard reference. FritzingCheckPart directly told me about the legId in the fzp but not in the svg, so I just needed to search the svg to see if it was really missing, or just a spelling difference.