I am trying to add some realism to my Black Hole simulation by making it so I can have wires that restrict the motion of my RBD fracture objects. Unfortunately I am struggling with getting my constraints to behave the way they look like they should be.

I am trying to use a Wire Glue Constraint to attach my wire to the two RBD boxes I have made. According to the help documentation, the “Mirror Constraint” option sounds like it should then attach the boxes to the wire, making the mutual relationship that I am looking for. What am I not seeing here?