Genuine Lenovo ThinkPad Thunderbolt 4 Workstation Dock Split Cable 4X91K16970. MFN: 4X91K16970. The Lenovo Thunderbolt 4 Workstation Dock Split Cable is dock split cable with 70cm (2'4") length, designed for ThinkPad Thunderbolt 4 WorkStation Dock by combining slim-tip power cable and Thunderbolt 4 cable.
eBay