Ford Mondeo heater motor resistor

Usually on the side of the blower motor housing...

i have looked and checked everywhere and cant find the resistor on my 2003 modeo lx i have been throught various sites and checked the location that people are syaing the resistor is located by taking out the glove box and padding on the underside of the passeger side dash i have also had the motor fan out as well but cant find the resistor there is however a cable with a black plug on the end just lying there not connected to anything and there is also nothing i can find to connect it to and there is a square hole roughly where i think the resistor is supposed to be located at the right hand side just behind the motor housing my blower is only working on setting number 4 is it possible that the resistor is built into the motor on my car as i have now been trying to locate the resistor for svereal days and cant pleae help.