Installing a heating element kenmore 70 series

we were given a kenmore dryer that needed a heating element…the heating element did not come with the dryer…we purchased a heating element from a local appliance center…we do not know who to hook it up..there are three wires and only one of them fit into the heating element…we are lost as to how to connect the heating element???

we dont know how old the dryer is and the model number is 11066722694