6v cables 12v motor

Hi.
I have just dropped a 12v motor in my Spanish series 2 which has the original loom in, can this be used with the 12v motor, if so which way do the cable go?
Cheers Shane.
I have just dropped a 12v motor in my Spanish series 2 which has the original loom in, can this be used with the 12v motor, if so which way do the cable go?
Cheers Shane.