Do you have a source for that? Because from experience (being an EU driver) most cars I've dealt with have the port in a different location.

Some as wonderful as being literally right in the centre console, to being as horrible as under a mat in the passenger side.

I don't have a source, but I was also advised a couple of years ago that it is mandated to be under the dashboard on the driver side.

According to http://www.obdii.com/connector.html :

Where is the connector located?

The connector must be located within three feet of the driver and must not require any tools to be revealed. Look under the dash and behind ashtrays.