Snap
If you have not already selected the wireframes you will prompted to do so. Select the wireframe objects to be snapped and click on the Accept Selection (Next) button (or right-click). Note that you cannot load a wireframe or edit other objects while the process is active.
Enter a Snap tolerance. Tolerance values greater than the minimum distance between wireframe points, or the natural separation between the Input wireframes, may produce undesirable results. The default is 0.00001.
Finally, click the OK button to process the wireframes you have selected.