cPanel powerdns sync with bind slave servers

I have a customer that switched to powerdns in cPanel. We use Bind name servers for slaves. Does anyone know where/how to allow my Bind server to sync with powerdns? None of the Bind settings I had translated to powerdns and I have no idea where to configure them in powerdns. I use bind transfer keys and specific IP's allowed to sync in the bind config. Thanks, Chuck