Stecker (Plug)

Stecker means "plug" in English.  This little sawed off cord is a puzzle by the infamous "Roger D".  Roger D is a mysterious puzzle designer from Germany, and his actual identity is known only to a few. Roger is known throughout the puzzling world for his extremely difficult and high quality machined aluminum puzzles. Roger's puzzles are produced in relatively small numbers and are highly collectible, they are also sold with no information as to the objective of the puzzles and this is classed as adding an extra degree of difficulty to them.

Stecker is made of aluminum with brass pins at the end of the plug.  The cryptic puzzle features three coated wires protruding from a rubber casing.  You will need to use your best ingenuity to figure out what to do with this creative treasure.