How can I do a 3D lookup table of a table with different sizes?

Hi, I'm trying to do a 3D lookup table in a simulink model, but I've got a problem with the sizes.

I've got 3 2D tables with different sizes:

Kbw1 604x6 double
Kbw2 490x5 double
Kbw3 664x7 double

I tried setting Kbw as:

Kbw(:,:,1)=Kbw1
Kbw(:,:,2)=Kbw2
Kbw(:,:,3)=Kbw3

But the dimmensions don't match.

Do you know any solution?

Thank you

[Image Analyst]

What happens if you try to access the (1,7,1) element? It's not there.

[Jose Antonio]

I know that, my question is if you know any way to do it so simulink is able to get the information...