https://support.lenovo.com/in/en/videos/vid100263-rj45-card-installation-movie-thinkpad-x1-carbon-20a7-20a8
RJ45 Card Installation Movie - ThinkPad X1 Carbon (20A7, 20A8) - Lenovo Support IN
RJ45 Card Installation Movie - ThinkPad X1 Carbon (20A7, 20A8)