How to make Tempo plugin internal categories show up in WLA

Anybody has an idea on how we could make tempo plugin internal time categories (link: appear within Worklog Assistant ?

For some members in our team this internal categories make up for most of their time (being able to do this will almost certainly make the decision by our management to buy or not as they are just the ones with this problem)

I do understand that adapting to a plugin is something that needs carefull consideration. Just hoping...
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