Replace 1st with 2nd shown in the figure below lets you explicitly choose which connector will be removed. The first connector picked will be removed and replaced with the second.

Merge by Picking provides three options.
Merge by Picking provides three options.

Auto Replace is similar to Replace 1st with 2nd except that the software chooses which connector is discarded. When you click on Apply, one of the connectors will be removed, and Pointwise will replace all references to it with references to the other connector. You cannot control which connector will be removed when using this option.

Auto Merge operates essentially the same as that in the Auto Merge frame. Here the automatic merging operation is limited to the entities you have selected. The Auto Merge command frame operates on the entire topology.


Merging Connectors

Fault Tolerant Meshing Using Grid Merge