http://www.buynewxbox.com/

My friend asked me to put an amazon link on that big red "GO" image.

On wordpress dashboard I couldn't find the image. It's sitting in a 'rotator' folder,
but I cabsolutely could not find the image on the dashboard so I couldn't add the link.
The page was made with Thesis them - and I know nothing about wordpress.

does anyoneknow how to do it?