I think you have the designations confused.

You have what appears to be the Electric BiPE, which has nothing to do with the 40S Ultimate... hence the confusion.

This one:

[link=http://www.nitroplanes.com/pubrelulbiar.html]Purple_Brushless_New_version_Click_me[/link]

The 40S is a completely different airplane altogether.

On the newer Electric BiPE, there is no cover on the bottom of the cowl area.

The opening is designed to permit air to exit, improving motor and battery cooling.