You should specify what config are you talking about.
If are software managed by DirectAdmin you can just set CB the same way of the old server and any custom config that are in:
/usr/local/directadmin/custombuild/custom
/usr/local/directadmin/data/templates/custom
If you have no custom template/config, your safe just with Custombuild options.conf file.
If you're referring to other services, you may need to specify.
Best regards