6 pin to 7 pin trailer connector for electric brakes

I guess everyone could guess. I would purchase a multi meter and check them out. In fact for checking wires when I know I am dealing with 12 volts I use the test probe that just lights up. Available at most auto parts stores. From experience I have found colors of those wires may not be the same. I wired my new MH on a Ford chasis. and discovered they used their own agenda for colors.