Hi,
Nothing needs to be done besides inventory mapping (logical connection between objects). SRM plugin exists at vCenter level and all vCenter objects can be managed using single SRM insrtance.
As Shobhan_L said, simply point new cluster (JCDCESX2) to the existing KCDCESX1 cluster on "Resource Mapping" tab. Just like you did this for JCDCESX1 cluster.
Michael.