Passive Crossover I Have A Yamaha EMX 5000 Power Mixer, A Passive Subwoofer And A Seperate Crossover. How Do I Connect Them?

I have a yamaha EMX 5000 power mixer, a passive subwoofer and a seperate crossover. How do I connect them? - passive crossover

I just want to know how to make a powered mixer (Yamaha EMX5000) with two phases of 300 EA for a 18 "Subwoofer Behringer. I also have a T-Amp Behringer crossover to have connection, but I do not know how to put together. We look forward to your help.