Is there a way to show the full path of a Samba share on a Finder window title?
An easier way in the GUI is to right/ctl click the top (dark grey) area of the finder window, select "Customise Toolbar" and drag in the "Path" icon.

Clicking this with the desired folder highlighted will give the path.

You could then drag the folder / share into the list on the left to save as a bookmark and right/ctl click it to rename to something more meaningful to you. Thus not having to worry about the path in the future.

Another quick way to find the path is to drag the folder into a terminal window which will populate it with the mounted path.