Put the antenna cables back into the latches:

start with the black cable

then fit the blue cable which should block them in place

(push sideways with the opening tool)

Then push them down into the slit next to the display adapter (push with the flat top side of the opening tool)

Now reconnect all the cables disconnected in steps 2 and 3

(for the antenna cables it helps to hold them in place with the tweezers and then push them into their socket with the flat side of an opening tool)