Select Personal PCs from the Product Group drop down menu, then click on Cradles. It lists two separate cradles for the E-125 and the E-200. They look quite a bit different also.
As far as modifying one of the cradles, I don't know . . .
nope.
That's why you need that goofy adapter if you want to use the stowaway keyboard. Casio hasn't been very forward looking since the switch from MIPS to ARM.