Implement vCD when Zerto already exists in vCenter

Hi, is there a documented procedure for what to do with Zerto when you have this scenario;

2 x vCenters with ZVMs integrated and VMs are being replicated successfully.

We now want to install vCD on top of each vCenter (two separate instances of vCD in multi-site), and move VMs in to vCD using the auto-import feature.

Is there documentation that explains how to modify Zerto to be able to handle this scenario?

Do I need to install a new (second) ZVM per site and link it to vCD instead of vCenter? Will I need to re-create all VPGs etc? I had a search but cannot find anything that covers how to implement vCD with Zerto when you already have a working vCenter/Zerto implementation.