Take the prying tool and carefully lift the metal clip on the flat connector above the right hinge.

Now pull it out towards you

Finally disconnect all antenna cables found (2 or 4, depending on your specs)

Disconnect them by either prying them off with the plastic tool or pulling upwards carefully from the cable itself.

Now carefully pull them out of the slit with a tweezer (the prying tool is too sharp and could damage the cable coating).