The keyboard is spot welded into the palmrest assembly. The only way I've seen to deal with keyboard failures is to replace the palmrest assembly. I may be missing something, but there's really no practical way to replace the keyboard and make it whole again after breaking the spot welded plastic.
I personally consider this design stupid, especially since it does nothing but was HP’s way to cost reduce the assembly on their end, and mark it up when someone needs it since you need to buy both and they don’t give you a choice. The only way to remove the keyboard is a destructive teardown!
I'm going to assume you don't need the guide, since you removed it. You will need to find the HP Spare# that has the correct keyboard and color configuration, as it is sold as an assembly.