hi thanks for the pic, unfortunately it is difficult to tell from that image.
you do have a graphics card installed (e.i. not built on to the motherboard) which is the blue card just underneath the case exhaust fan, if you can unscrew the screw holding it to the case and take the card out i will be able to get a better view BUT be careful as there may be a small clip holding it in place to the right of the card (from this view)