Moving a Cloudflare registrar domain to another Cloudflare account

I’m having trouble pushing a domain from Cloudflare account A to Cloudflare account B. I am a super administrator of account A and an administrator of account B. The domain is registered with Cloudflare registrar.

I am stuck on the step when account B is waiting for me to change the nameservers with the registrar, but I can’t seem to find that setting in my account A. How do I proceed?

I believe for internal domain transfers, you may have to get some help from Support to make these changes:

Login to Cloudflare and then contact Cloudflare Support by clicking on the Get More Help button.