Hello,
Thank you for contacting the support and sorry for any inconvenience that might have been caused due to that.
You can connect it again in the same settings. In order to connect your correct account, click on Connect Now.

Once you click on Connect Now, please ensure that you’ve selected the correct account and then click on OK, Activate Now, as shown below. In case you’ve multiple PRO licenses associated with your Rank Math account, then you can click the License drop-down to choose your preferred license to activate on this website.

Your account will now be connected, and you can check your connected websites from your Rank Math Account Area. https://rankmath.com/my-account/
You can also check out this steps to properly setup Rank Math on your website: https://rankmath.com/kb/how-to-setup/
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.