Hello,
Do I understand correctly: you want newly added devices to have different monitoring update period settings already preconfigured, rather than default values of Dynamic monitoring every 5 minutes and Static monitoring every 15 days?
If that is the case, then there is no way to change the default values, before adding the device.
If you could provide a more detailed description of your use case, I could forward a suggestion to RMS team to consider implementing it in the future.
Best regards,