Migrating WP in New Domain on the same host

I’ve existing domain abc.com now that I’ve a new domain xyz.com which I’ve configured as “Add On Domain” in the same host with home directory as /public_html/xyz . Now I want to move my abc.com to xyz.com. I’ve checked some reference but not yet clear on how do I migrate to new domain on the same host server. Any help in this regard is much appreciated.