After configuring your Domain API reseller, you may wish to move the domains that were already active on your account to the new Reseller Account.
To do this follow the steps below
Step 1: Login to your Client area.

Step 2: Go to Domains -> Reseller Area

Step 3: Click on Domains
A list of domains you currently own will appear here.

Step 4: Then Click Assign Domains.
The domains will now be under your Account as the Domain Reseller
Happy Hosting!!