I am creating this thread to ease some of the stress in regards to installing his lower grille badge. I am sorry I dont have pics while installing it but I have one of the final product.
First, in regard to the final location of the badge, it is placed as far to the driver's side of the open mesh of the grille. If you can notice, the mesh is filled in about 6 inches from each end of the grille. I chose not to drill any holes. Besides, the filled in mesh is closed off from the inside too so you cant even get the backing plate on to even secure the badge from behind if you drilled a hole for one of the posts.
Locate the forward collision sensor in the middle of the grille. There is an outer plastic bezel around it that just pops out easily. I'm amazed that it doesn't pop out on its own when hitting a rough bump in the road.
Next, there is another smaller plastic bezel that seats directly around that sensor. That pops out easily towards you too.
Now you are able to gain access behind the grille with your left hand by gently pulling it away with the fingers of your right hand positioned through the mesh just enough so you are able to gain access to the backside of the grille. If you have gorilla hands, you may have to ask someone with smaller hands to do this part.
The badge with the posts should already be placed through the grille at your preferred location. Carefully place the backing plate behind the grille and over the posts. Take a magnet pen and feed the lockwashers through the mesh into your hand that is already positioned behind the grille near the posts. Do the same with the nuts. Hand tighten the nuts on top of the lockwashers. I then used a ratchet wrench that I fed behind the grille and ratchetted the nuts on tighter with the boxed end of the wrench. Thats all there is to it.