For monitors at least, if you plug in to the wrong port you will get a GUI prompt advising you to use the other one [1]:

> while the ports aren’t labeled, if you plug an external display into the “wrong” port, you’ll get an on-screen notification suggesting you plug it into the other port.

[1]: https://daringfireball.net/2026/03/599_not_a_piece_of_junk_m...