https://www.etechnophiles.com/thunderbolt-pinout-1-2-3-4/ Based on the D+/- pair...

		Moto7451 on Nov 24, 2023 \| parent \| context \| favorite \| on: Apple's Pro Display XDR takes Thunderbolt 3 to its... https://www.etechnophiles.com/thunderbolt-pinout-1-2-3-4/ Based on the D+/- pairs I believe you’re correct. On Titan Ridge and later add in cards USB 2 is expected to be passed through via a motherboard header as the controllers lack a dedicated USB 2 chip.