Help Me Identify This Brick / Bracket
Picture little blurry, but this is what I see...  The builder attached the tiles to Part Number Forty-Seventy. 

Part #4864a, the (black) window piece is really trans-black in color, but the way it's used here, with it being reversed and all, obstructs the proper identity of the white 1x1 bricks, causing some viewing tricks on the eyes...