code: public final static void addConnection(final ConnectionNotation notation, final int position,
  			final HELM2Notation helm2notation) {
  		helm2notation.getListOfConnections().add(position, notation);
  	}
docs: method to add a new connection at the position of the HELM2Notation
  
  @param notation
  new ConnectionNotation
  @param position
  position of the new ConnectionNotation
  @param helm2notation
  input HELM2Notation