Custom Secret-id using CLI?

I understand how to set a custom secret-id using the API but how would I do it using the CLI?

Does this look right?

vault write -f auth/approle/role/<AppRole>/custom-secret-id secret-id=<Custom Secret ID>

This is the correct way, after testing:
vault write -f auth/approle/role/<AppRole>/custom-secret-id secret_id=<Custom Secret ID>