It looks like another wire cut as well -- Blue emerging from the connector top right. Or was that blue wire the one that was being used for ground?
The connectors look as though they may be the set-screw type. The type we use in the U.K. are slightly different with two screws, supplied in strips so that you can cut the plastic between them to get a block of one, two, or however many are needed. They're colloquially called "chocolate blocks," as they were dark brown/black originally. Most are a clear plastic nowqadays, but I've never seen any in the bright color of these German types!
