migrate only proxy settings from nexus 2 to nexus 3

Question

We are planning to migrate from nexus2 to nexus3. I intend to select only the proxy repos that are currently active in nexus2 and move them to nexus 3. Moreover, I think copy of proxy repo configuration would suffice, as the artifacts will anyways get downloaded in nexus 3 storage, when the build happens. Is it possible to copy only the configs of required proxy repos via upgrade wizard ? or is there any other way to achieve this?

Thanks!