I noticed a few of these were similar to what I'm suggesting,

(https://ideas.gohighlevel.com/saas/p/saas-mode-v2)

and (https://ideas.gohighlevel.com/saas/p/enable-saas-mode-re-billing-options-when-creating-new-locations-with-api-v2)

.. but I just wanted to mention that v1 is about to be deprecated and it's currently the only way to get a Location ID from a SaaS Mode checkout.

Is there any way that we can move this over to the v2 API?

Reference: https://public-api.gohighlevel.com/#b9e0ca1e-9bf1-402e-a649-3166b4e5136a