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, almost every CoCo since uses a mylar ribbon. They are all wired the same way. and the physical keyboard mounts are all the same.
So this gizmo (ribbon cable NOT included) will let you fit one of those old keyboards into anything, except that one CoCo2 model with melty keyboard that is plastic welded, not the melty keyboard that is screwed together.