...I actually do not know the Pi model I am currently using...it is an old version and yes it's 26 pis.
I bought a ribbon but didn't pay attention to the number of pins, and its actually a 40 pins ribbon.
I checked which pin matches which plug with a multimeter and finally I connected the ribbon using only the 26 holes on one side...
I know it would be easier to get 5 euros and go shopping in a computer store....but what's the fun of it?
Oh, thanks for the idea of Imgur!!!