I found a reference to these pins in the F030 service guide.
Falcon030 also has hooks to interface to the new Aari Universal Keyboard Controller. These hooks prevent data overrun both to and from the keyboard controller.
That's all I've found so far.
Oh, and I think they are named KROK & KTOK, or possibly KRCK & KTCK. It's hard to see on any of the schematics I've got.
KTOK seem to be hooked up to pin 150 of Combel. KROK I have yet to find...