Batboard

I have a 3 button Saber II and a systems saber with the full keypad. I would like to take the case from the Systems Saber and put it on the Saber II so that I can use the keypad. The Saber II has the keypad sensor on the case but how do I program the Saber to use the keypad?
The Saber is H99QX + 061H H44QXJ7139CN

Is it even possible?

Thanks!

you can put the systems saber case on the saber model II if it has the full keypad and then build a codeplug for to convert the model II to a model III