As mentioned here https://meta.miraheze.org/wiki/Community_noticeboard#WikiBase_custom_configuration I would like to make some specific configuration to the WikiBase Repo extension on my wiki.
I would need to customise the variables
$wgWBRepoSettings['siteLinkGroups'] $wgWBClientSettings['specialSiteLinkGroups'] $wgWBRepoSettings['formatterUrlProperty']
and the sites table accordingly.
First of all, is this even possible? If yes, can you explain how?