You can access vCC either through the vSphere Client or through vcloud.vmware.com, depending on how your vCC has been set up.

1

If vCloud Connector is registered with the vCenter Server to which the vSphere Client is pointing, vCC acts as a client plug-in.

2

If vCloud Connector is registered with the vcloud.vmware.com website, you can access the vCC UI through the website.