Put the microphone in the Hole shown by the Red arrow. The cable goes the path marked in orange.

Put the Ribbon Cable from the touch pad in again. Don't forget to push down the small black plastic bracket.

Now you can just put the outer shell back on. Hold it in place and get the screws back in, from the other side

If you have removed the foam just put it back in. It holds perfectly without glue for me but if you want to be sure you could put a few drops in.

The Earpads can just be pressed into place by hand. They only go in one direction so if you can't click all notches back in, try it the other way around.