MMM brushed, which wire to float?

[himalaya]

Hi guys,

I'm going to drive a brushed motor with my MMM, reversing needed. The manual says to leave the white wire floating but the MMM has NO WIRE at the motor side, just 3 gold 6.5mm sockets. So which is which? How does the red/black/white wires all corresponded on the MMM?

Thanks in advance.