ConnectBasic Coord. Object
The Connect Object connects the object points of any number of separate objects, within a defined tolerance, and can even weld them if desired.
The Connect Object can be converted to a polygon or Spline object using the Make Editable command or by pressing the C-key (however, the spline points from different spline segments cannot be merged).
Group all objects to be connected into a single Child object (e.g., a Null Object; a Cloner Object was used in the example above) and make it a Child of the Connect Object. Alternatively you can drag the Null Object into the Object field.