The original CoCo1 chicklet keyboard, and a number of aftermarket full key ones, used a ribbon cable and pin header. Starting with the F board, every CoCo uses a mylar ribbon. All but one are wired the same way. and the physical keyboard mounts are all the same.
So this gizmo will let you fit one of those old keyboards with cable into anything, except that one CoCo2 melty keyboard that is plastic welded (no screws).