If the composite layers are positioned on top and bottom surfaces of the foam core, you can start by adding the foam core as the first “layer” on the surface. You can apply half the foam core thickness in the “up” direction and half the core thickness in the “down” direction from the surface. Then, you can add the carbon layers on top and bottom surfaces. The result is as follows:
You will need to create double the amount of Oriented selection sets; some for the “up” direction, and others for the “down” direction:
Let me know if this helps or not.