I purchased two 43' Frame TVs (UN43LS03NAFXZA). The unit comes with a " No Gap" wall-mount bracket (BN96-43501L). I am mounting on drywall. The instructions say to use F & G which look to be some sort of strange toggle bolt and screw combo, but neither are in the box. I could see missing them in one, but they are missing in both. Oddly, the unit comes with the hardware to mount to concrete. Any ideas what these are and where they would be?