You need to create a soft body object (wire or cloth), a constraint, and another dynamic object with points to constrain to before you can use this tool. This tool is often used to pin wires to other wires.

1. Click the Attach Constraint to Dynamics Point tool on the Wires or Cloth tab.

2. Select the constraint to parent and press Enter to confirm your selection.

3. (optionally) Select the goal object you wish to constrain to, then press Enter. If nothing is selected, the tool will constrain to internal animation.

4. (optionally) Select points on the goal object if you want to restrict the closest-point selection domain, then press Enter. If nothing is selected, the tool will constrain to the closest of all the goal object’s points.