How to add Nodes to existing 3node MDM cluster

Hi,

Just I created 3 node MDM cluster as below

Node1-MDM Manager Master + SDS + SDC (Linux)

Node2-MDM Manager Slave + SDS + SDC (Linux)

Node3-MDM Tie Breaker +SDS +SDC(Linux)

I configured above cluster using Installation Manager (IM) +Gateway which is installed in another Windows machine.

Above all three nodes contribute storage and I could create Protection Domain, Storage Pool and Volumes properly and assign to above three SDCs properly.

Now, I want to give access to this storage to other Linux nodes.(I mean Just SDC)(I hope this is possible )and add some more storage nodes (SDS+SDC or SDS only) to the same cluster. How do I do that? Do I need to do via Installation Manager(IM)? I am not finding option there. It is asking to create new cluster again.
Please suggest steps how to add extra storage nodes and SDCs to the existing cluster.

Thanks