Subwoofer wiring

I have dual voice coil subwoofers .

The have direct leads from the voice coils .
So there are 2 positive and 2 negative 8 guage wires on the subwoofer .

What’s the best way to connect both leads together then to the speaker wire coming from the amp .

Do I twist them all together and tape them , do I solder them together or use some sort of butt connecter ?