The throttle position sensor is located on the throttle housing. Its got four wires on it in one connector and two bolts holding it in place. It can't just be "put on" it has to be adjusted.
how do u adjust the throttle position sensor once u replace it. on 2003 Dodge Stratus
turn it until it almost engages and then give it some gas. it should sit at the proper idle speed until you give it some gas. their shouldn't be any slack in the sensor so you should only have to put the sensor on without spinning the shaft.