How to configure for self-hosted registration?

Greetings, we are attempting to call the https://api.tackle.io/v1/registrations API ... we get this error:

{
    "code": "invalid_product",
    "error": "The product 'REDACTED' is not configured for self hosted registration. A registration redirect must be defined.",
    "error_type": "service_exception",
    "errors": []
}

Is there a way for us to programmatically swap from a Tackle-hosted to self-hosted registration page? Or do we have to go through the [email protected] email?