WordPress-Website Repair

I have a website source code, which has been configured to the server, but I have not added a domain name yet. I need to add a domain name for me to make the website run normally. The website was previously made by another technician, and I can't contact it at present. The payment interface of this website is The encrypted currency interface is used, but I don't know where he changed the payment interface address, so I need you to check for me whether the technician has set up to modify the payment interface address at the back end.

At present, the website is normal, but I need to query the payment interface setting area. I need to modify the payment interface address and replace my own payment address information.