how to customize the triange for 2 and 3 level ?

Hello,
I customized the php file "theme -> css3megamenu -> css -> maximenuck.php" and I don't find where to adapted/customize the little triangle to show that there is a 2 or 3 level.
see the image:



I had done it with the version 6 of MaximenuCK, but then, the triangles where images.
Thank you for a little help.

I found the code. It's done.