Its fine. The slash guard is just beneath the fog lights. They are attached by 4 plastic retaining clips. If you look in the owners manual und replacing the fog lights, they have a picture of the guard and the clips. As far as the electrical goes, that is actually the easiest part. No soldering reuired. The wiring harness that comes with the HID bulbs and ballast plugs right into the OEM plug that goes onto the current factory bulb. Theres not a huge draw because the ballast does the voltage conversion to fire the bulbs, after that the draw is not dissimilar to the factory bulbs.
I did this on my 2011 after I got it and was a little apprehensive at first also, but after the first one, you will fin there is nothing to it. The 2013 was the same, just a different bulb.
Hope this helps.