When reinstalling the antenna cable assembly, on the front side of it facing towards the trackpad, there is a flat silver piece of metal. It needs to go into a little track in the MacBook. If it doesn’t, things will seem normal until you go to close the lid, and you will get a click.
I have done 2 these these exact same 2019 MacBooks now, and both times The screw on the right seems to not be a T3. At first it appeared that I stripped it, but once I got to the second one and I was very gentle with it, it’s a totally different screw. And I can’t figure out what it is… But the T3 or the T4 will not remove it. Neither will a Pentolope. I just removed the left screw, and then I pivoted the cover away so I could remove the connecter. Anyone else having this issue?
After doing the job the first time, when I opened the display there was something clicking loudly. I had found out that this antenna assembly wasn’t put back properly. When reinstalling this, there is a flat metal piece on the bottom centre of the antenna assembly. Mine became bent for some reason. I had to bend it back straight. It needs to click back in to top case. Problem solved!