You could use NIP-65 as your client's settings if you wanted them to match what you advertise. Or you might have a reason to use additional relays that you don't advertise to others, and store that information elsewhere, perhaps in a NIP-51.
Well, 10002 events are not for storing configuration settings:
"The primary purpose of this relay list is to advertise to others, not for configuring one's client."
https://github.com/nostr-protocol/nips/blob/master/65.md
I reckon storing client settings should be done in a specific "list" (maybe a private list) as defined in NIP-51 (still a PR).
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