Fallback shipping KSA

We would like to be able to set the fallback shipping required by the KSA solution in Brink and not in our CMS.
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Vi har snackat snabbt med Brink om det, så lite info:

Vi behöver också sätta upp en fallback för shipment.

https://docs.kustom.co/contents/checkout/shipping-assistant/overview

https://docs.brinkcommerce.com/workflows-and-integrations/integrations/payments/klarna

https://docs.kustom.co/contents/api/checkout/other/createordermerchant#other/createordermerchant/t=request&path=shipping_options