On this step, I encountered a problem. The middle screw was screwed in very very tightly. As a result, I ended up stripping the screw despite being very careful. I tried to use a wire cutter to remove the screw, but that did not work. I actually ended up using the wirecutter to cut the bracket off, leaving the screw screwed in. This did not affect anything. I am typing off of my replace macbook top case right now.
The point is, BE CAREFUL! but if something does go wrong, don't fret. There are solutions.