Visio 2007/2010 connection points

Hi,
Today I found out how to add "connection points" in Visio.
Often people drag and drop stuff from wizzard and its nothing wrong but they got defined the connection points. What when we want put connection point in our opinion best position?

Visio 2007:
MS help, Youtube help

Visio 2010:
MS help

I work on Visio 2010. And here where is it :) the "x" is connection point. Select it and press CTRL now point where you want add x point :)
You will be able to connect to it any connectors.

Hope it would help someone in the future.