I'm afraid I don't know anything about ThinkPads. Hazarding a guess I'd say it's using Thunderbolt (hence the specific port requirement) which allows you to tu

I'm afraid I don't know anything about ThinkPads. Hazarding a guess I'd say it's using Thunderbolt (hence the specific port requirement) which allows you to tunnel PCIe over it. Though it is odd that they wouldn't just go with the WiFi on the motherboard option.