3 phase alternator and WLA compatibility

The joy and pain of 1) installing something new to find it works a treat (Norvil Warning light assimilator), and 2) finding out I need an alternator.

My question: will the WLA work with a three-phase alternator? It is a 4- prong box type replacing the stock 3 prong can.

I currently run the single phase stock alternator. I suspect the magnet is dead, as the usual checks to the alternator with a meter are good.

Thanks for your help!