Maya 2012 Tutorial
How to Connect Two Curves in Maya
Choose Create > CV Curve Tool and draw two curves in the top view. The curves should flow in the same direction and have a slight gap between curves
Select the first curve, then shift select the second curve.
From the Surfaces menu set, choose Edit Curves > Attach Curves and select the menu options.
In the options you can choose to either blend the two shapes or connect the curves. To maintain the existing curve shapes, select Connect. If you have no further use for the original shapes, deselect the Keep Originals box.