Brother HL-L2365DW laser - TN2320 toner compatibility

I have this printer, bought these toner cartridges as everywhere says they are compatible. Can't get them to fit. Plastic node on right hand side too big to slot in. Anyone found the same? Am I doing something obviously wrong? Recommend any alternative compatible cartridges so I don't have to fork out for their proprietary ones?

(I tried hacking a bit of the plastic off the node but not easy - might be the solution though.)