The antenna cable connector and socket are fragile.

Use the point of a spudger or fine tweezers to gently pry the antenna cable connector straight up off its socket on the logic board.

To reconnect the cable, use tweezers to position it carefully over its socket on the logic board, and then press it straight down until it snaps into place.

If you need more slack in the cable, you can temporarily pry it from the clips securing it to the antenna plate.