Slide one arm of your angled tweezers under the head of the gray antenna cable connected to the WLAN card.

Gently lift straight up to disconnect the cable.

Repeat the same process to disconnect the black antenna cable.

To reattach antenna connectors like these, align the connector over its socket and press down with the flat end of a spudger. The connector should snap into place. This can be tricky and may take a few tries.