Adding leaves to rotating kitchen table

Hi,

I have the kitchen table which rotates 90 degrees. At one exteme it is effectively parallel with the module which contains the Thermador and it rotates around to perpendicular with this same module.

In this latter position I can attach two leaves which extend the table size. The leaves fit perectly, however when I attach them, there is no obvious way to suppor them. Am I missing some hardware to support these leaves?