Tweaker Speaker Question????

[3 Mile Stone]

I just bought two Egnater 112X cabs. They both had the stock Celestion G12H30 speaker in them. Someone had obviously pulled one of them out at some point. One box had the red wire to the positive speaker terminal. The other cab had the black wire. My gut instinct tells me the red wire would be positive as it is marked on the Tourmaster 212X. The circuit board on the Tourmaster cab is clearly marked and positive (red) and negative (black). The Tweaker cab has "red" and "black" identifying labels on the circuit board, I guess for all of us color blind guitarists?

Question is which is positive, which is negative, black or red???