To create a point on curve locator
-click
the curve and select Curve Point from the marking
menu.
As you drag, you move the curve point. The curve point’s position is defined in terms of the curve’s U parameter.
.
The Point On Curve Options window appears. See Create Deformers > Point On Curve.
Maya creates a locator at the curve point with the default point on curve options. The curve point is now constrained to the locator.
For each curve, Maya creates a least squares modifier node (default name: leastSquaresModifiern).