The screws holding the thing on are plasticand screw into some more plastic clips just stuck into holes in the frame. The screws get stripped really easy from being rescrewed in without finding the original spiral. The plugs also fall out of the body. But it sounds like they didn't put it back on at all. It shouldn't be able to fall off as it's also attached to the front wheel well liners.
Also another way of reading this is that the litle squares that pull down on each end of the splash shield are what's missing?.. Those can be tossed or not/ youre preference.
