Ann: Appendix 3B, page-3

This looks like an additional payment to complete the purchase of 55% of MCL to the original owners of MCL. It may not be this, but I would expect the BoD of QBL to make a part payment initially and then a final payment once a key licence has been granted by the Aust. Gov.
Better this way than a cash payment which would play out later as a Capital Raising for QBL.
The above is only IMO, but sounds like a normal transaction for a junior ASX company.