Baffled about the ThunderBolt2 port on the W541 laptop which may or may not work with a Lenovo 40AS0090US ThunderBolt3 dock if the cable exists. : r/ thinkpad
Lenovo ThinkPad 3.0 USB Ultra Dock 40A2 for T460 T540 L540 X240 W540 (No Key/AC) | eBay
Amazon.com: Lenovo ThinkPad USA Ultra Dock With 90W 2 Prong AC Adapter (40A20090US, Retail Packaged) : Electronics
Lenovo ThinkPad W540 20BH Laptop Dock
40A20 ThinkPad Pro Dock Port replicator 65W for ThinkPad T540p T550 T560 T570 X240 X240s X250 X260 X270 W540 W541 W550s 00HM917|Laptop Docking Stations| - AliExpress
Lenovo Black 40A20170US 170W ThinkPad Ultra Dock - Newegg.com
Lenovo ThinkPad Pro Docking Station - 2 x DP - 40AH0135US - -