This generally service led activity, but within the capabilities of the system admin. The procdure is outline in the product document library (PDL).
https://knowledge.hitachivantara.com/Documents/Storage/Content_Platform/9.2.x/Administering_HCP/Storage_administration/05_Working_with_S_Series_storage_components#Add_an_S_Series_Node_to_your_HCP_system