So I did this little mod a while ago, but haven't gotten around to posting it. Here goes.
I use my engine block heater in winter, and I got sick of opening and closing the hood. (First World Problems, I know). So I thought, hey, I've got a Euro grille, the badge swings open, and I can run the cord through there!
Started out kinda like this. (I removed the radiator cover thing a few months ago because I broke the little plastic fasteners and it pissed me off, I'm sure you could leave the cover on and still make this work somehow.)
Then I done did some Dremel'ing:
Eventually my extension cord fit into the hole:
And now I can do this!
The only issue is that the block cord is currently sitting in the space and is not secured in any way other than friction. This means that I have to open the hood to jimmy everything around to get the cords to plug together, but I can then shut the hood and forget about it. I have the outlet on a timer that starts about 3 hours before I go to work, so in the mornings I just pull the extension cord out, flip the badge over, and off I go! Eventually I might secure the block plug a bit more so that I don't even have to open the hood, but it works fine for now.