If it has ABS you should see smaller rings inside the brake disks with slots or rectangular holes.
Well, inside the rear disk and 1 front disk. They are part of the ABS system, but I can't tell from your pics.
I think I see what you're talking about. If you look closely at the first picture you can see a black ring with rectangular holes right on top of the disk. Quality of the picture might not be so good on here but it's better on the original pictures.