MMM brushed, which wire to float?

[j.f.s]

If understand the question correctly he's asking where to put the motor wires as the MMM only have three identical sockets without any marking on them. My guess, note guess, would be to put the two wires from the motor in the outer sockets.

I've got my brushless motor connected with the red and black wires in the outer sockets and the white one in the middle.