K-Line steamer help

Hi Everyone,

I am working on a steam in which the wires between the tender and engine were torn apart, so there are 2 brown wires and 2 blue ripped off the engine side of the female plug, ideas as to which pin they should be soldered to? there is 1 brown connected to the motor, and 1 blue there is also 1 brown that is soldered to the engine board and 1 blue soldered to the engine board, here are a couple of pictures.

thanks,

Jon