Nick Isn't Working with The Liberals
Nick is working with the Liberals!
SA-BEST exists to give you, the voter, a genuine third option so that you don't have to vote for Labor or Liberal. It wouldn't make sense for Nick to create and run a party just to work with a party that already exists.
Notably, SA-BEST hasn't given preferences to either party.
If you ask the Liberals, they'll say Nick is working with Labor (which also isn't true).
You can see SA-BEST's How To Vote Cards for yourself, here.