If you aren't replacing your button board, you can leave this cable connected and lay the board over the left side of the frame after you've removed the screws.

Be careful when disconnecting the haptics, as the cables and connector are very delicate. Pry only on the base of the white connector, and not on the cables or socket.

Insert the point of your spudger under the neck of the haptics cable connector.

Gently pry up to disconnect it.