Solutions Enabler Licensing and BASE/Symmetrix license for all snapshot types

i am trying to configure intellisnap , storage array is powermax 8000 , and my media agents are hyperscale x nodes , having access to storage via fiber (SAN mode)

 i was going thru below requirements , if anyone can clarify doubts 

https://documentation.commvault.com/2023e/expert/system_requirements_for_dell_emc_powermax_vmax3_vmax_symmetrix_storage_array.html

1> Solutions Enabler Licensing and BASE/Symmetrix license for all snapshot types - where is this referring , for the storage array or on media agent

2> LUN masking records and views must be accessible from the host where the backup takes place. what is the host referring here ? 

3> what is client and proxy computer , remote MA referring here , since we are using Hyperscale x nodes we are not planning to install solution enbaler on that, we already have solution enabler installed in one mahine can we use that , or do we need to install any package on it

what is the best practise in my scnario , 

powermax with hyperscale x nodes