DO NOT LAY THE TWO HALVES FLAT!!! There is a reason why the third photo shows the screen half leaning against a box! This really needs to be a warning in addition to the one about not separating the display.

That happened to me and I could not figure out how it got broken. It's the home button and fingerprint reader.

But I'm not bothering to get it fixed and I'm not replacing the entire screen. I went into system prefs/accessibility and activated the on-screen home button. Oh, well.

For parts, I use an egg carton and place all screws and parts for each step into one of the egg holders, moving clockwise as I go.

An oblique photo would REALLY help show just exactly where the tab is supposed to go. I opened the high-res photo provided here and zoomed in on it, then looked at my phone at an oblique angle to find the slim little slot for the tab.

I use a plastic egg tray, I drop all the screws and small parts (like the camera) for each step into the same egg indentation. You can see that the screws are different lengths, so I don't put one screw into it's own spot. I used 5 egg indentations to replace my screen.

Phew! This was one of the trickiest repairs I've done. I've repaired numerous Apple laptops, but these things are really insane.

Trouble spots:

There are four tabs on the speaker assembly, one of mine snapped off because I'd be prying one into place and another would pop out, etc...

Also, it took me numerous attempts to get the logic board in properly. At first the thinner screen cable had gotten folded under itself by having gotten stuck to the glue. Also the sliver block in the wider ribbon has to be pressed down harder so that the logic board can seat deeper. It was hard to tell how far down into the frame the logic board was supposed to go. An oblique photo would really help here.

Other tricky spots, well those round RF connectors are always a problem. I mashed on good on a Mac Mini once.

Be REALLY careful putting the ribbon cable connectors back on!

I took a lot of time, about 2 and a half hours, because I didn't want to break something by being impatient.

I thought I had the same problem, but I removed the screen again and found that the thinner cable had folded under itself. At every motion of re-installing the screen, I had to hold those dang cables taught to keep them from folding under again! Ugh. The thin one had a fold in it, but it still worked.