Clarification on EndPoint resouce schema (specific to iSCSI)

I have the following query on the EndPoint resource schema.

1. PciId ,HostReservationMemoryBytes
     -- I assume this is not applicable to the iSCSI intiator and targets
2. ConnectedEntities
         -- Looks like Storage initiator refers to the initiators and Storage expander refers to the physical device. What will be the entity type for the iSCSI storage target endpoint ?
         -- I assume EntityPciId,PciFunctionNumber and PciClassCode is not applicable to iSCSI storage
3. Links to Ports
     -- As per specification, it is specific to physical ports. So i assume this also not applicable to iSCSI Storage servers.

I am not able to find mockup which represents iSCSI storage and initiator. Do we have any mockups for the same? Which will be helpful to understand better.

And also which property of EndPoint resource specifies about the iSCSI Target Portal  Groups?

Thanks.