Maybe they’re just looking at the back. The listing says 600 watt, and while I can’t find one that looks like that for 600 watt of the build referenced, I did come across this Rosewill unit that does look similar(at 650 watts) -
Note the grill holes, switch, and sticker. Plus the location of the internal components(see silver/yellow). I only did a quick search, but that’s the closest I could find to it. Not sure if they make a 600 watt similar to that one, the listing/photo is wrong, or it’s another brand with a similar design.
However, you can’t always tell with the photos with these pre-builts depending on the company/model. Some companies won’t tell you a specific part, because they put in whatever they have(or better equivalent) to fill their listing requirement. Some will pull from higher quality components to fill the listing product requirements, some won’t. So often times what they show in the pictures is partially meaningless, just a guide of what range of components you can typically expect. But again, depends on the company/computer model as to what parts may change from the photo.
I originally thought Kag made a simple mistake in regards to the shroud, but they seem to be in the right direction, at least from what I could find. However, even if it is the part I linked(or what Kag thinks it is, if it’s something different than the one I found), it’s possible that specific part won’t be in the build purchased, but it should be sort of an equivalent to it.