I have an older C2200 In the manuel it doesn't show the handle bars. Does the key have to be in in order for this to work? Where can a key be purchased? My wife hasn't used this for a few years. I set it up and theres power to the motor but it will not work. From reading the manuel it sounds like a key must be used. Where does the key plug it. As I said the c2200 manuel doesn't show the handle grips as mine does. Thank you