@xoagray and since #Lenovo stopped making #ThinkPad #CompactKeyboard|s with #wired #USB and I need a new #Keyboard for the #NUCbook anyway, I guess I've to get in contact with #Sprintek and get some #SK8707-06 - #FlexPoint™ PS/2 Pointing Stick Mouse Modules...
https://www.sprintek.com/en/products/pointing_stick/SK8707-06.aspx