This doesn't look so much like a CarPC.
I am guessing the screen you got has a large ribbon connector on it for data, and then one or two connectors for the backlight inverters.
Just pry open the case, disconnect what is there, and connect the new one. THat is if you really only killed the screen. If you "bust" your screen by physically breaking it, then this should be fine. If it "bust" by just one day going out with some smoke too, then you are screwed.
And this site (contrary to the misleading name) is for people who do CarPC's. Not standard HU repair.