I think someone replied to that with something I hadn't thought of, which is, what's the point of the pass through if you're then gonna block over the fins with whatever that is to stop the cables getting damaged. I realise there are some holes, but you'll also have the cables in there. I'm torn whether I like that idea or not, I also worry about the mess of cables exiting the card on the motherboard (tray) side.
You don't see the cables at all they come out of the PCIe side of the GPU and straight in to the motherboard tray passthrough to the cable management side of the case.