Add Move Or Delete Connection Points. Just clicking on the line will work too but its a bit fiddly you need to click and then drag a little bit for it to register. A dynamic connection maintains connection to the shape when shapes are moved around and finds the shortest route between the connected shapes.

For other Connector options next to Connect select. Add move or delete connection points. How to Add Move or Delete Connection Points on PC Few tips on how to manage connection points in ConceptDraw DIAGRAM drawings.
Delete or hide connection points.
You can also hold CtrlCmd and click at the required position. When you glue a connector or shape to a connection point they stay connected even if one of the shapes is moved. When the line is connected the outline of the object being connected will turn red as shown in the figure below. If youre having a hard time moving the connection point to exactly where you want it try different snap settings.