Hello Max,

As far as I know there is no option that needs to be enabled for this. Your approach is correct, if the lookup doesn't appear automatically you can opt to set up the link through metadata.

You may have already seen this doc but take a look https://www.labkey.org/Documentation/wiki-page.view?name=lookups

Would it be possible for you to show me your query and associated metadata. Having this will allow me troubleshoot further.

Thanks,
Chet