The docking station provides one upstream and three downstream Thunderbolt 4 ports (the latter supporting up to 6K/60Hz on Mac and 8K/30Hz on Windows), two HDMI 2.0 ports, two 10Gbps USB 3.2 Gen 2 ...

The Apple device contains the socket, and the cable or docking station has the plug. In 2012, the original 30-pin analog+digital interface was replaced with the 8-pin all-digital Lightning connector.