I have a replacement blower motor for my 86 Corolla SR5. The old part had a plug attached tho the wires which plugged into the wires in the car itself. The new motor has two wires but no plug or connector. How do I install it? Should I just cut the other end from the wires under the dash and twist them together with the ones on the replacement motor? If so, the wires on the part are orange and black, the ones under the dash are blue and red. What gets atttached to what?