Presenting datastore LUNs from multiple vsphere platforms to same VMware backup host

We have been running a Windows 2008 VMware Backup Host in NetBackup 7.5 successfully for some time.  The Backup Host uses SAN transport and has datastore LUNs from a vSphere 5.5 instance mounted over FC.  A new vSphere 6.0 instance has been introduced using iSCSI storage.  Assuming I upgrade to 7.7 first to support vSphere 6.0, can I zone these datastore LUNs to the same VMware Backup Host and add the vCenter 6.0 credentials to NetBackup to enable VM backups for this instance too?  

I would add dedicated NICs to the server for the iSCSI connectivity and for now lets assume the Backup Host's performance is not an issue.