implement moving the ends of a line connection

[meeterp]

now the ends of a line connection is in the center of a figure, the location of line end is fixed, that is so inconvenience, cannot draw more than one connection line between two figures

[wumpz]

Using the "draw" example you are able to draw than more connection line:

Using the "net" example you see how multiple connection line snap points can be provided for one figure: