Fibaro home center lite as a slave

Hello,
Has anyone tried to enslave another home controller to HE ? I am thinking of experimenting with my old home center lite. Would the integration be done through ZWAVE or HTTP ? I would wlecome as much detail as available on this topic.

Thanks,
Amine.

In fact, I would be interested in help enslaving any home controller to HE, but more particularly the Fibaro HCL, as I have an important number of modules already setup in it. But judging from the zero reply so far, it seems this is not something that can be done ?