Before I purchase a repair manual, do you know.

Before I purchase a repair manual, do you know if the manual will provide information to replace a servo motor (mix) under the dashboard? I have the part and have had a mechanic friend temporarily fix the position of the "damper" in the "cold" side for a/c. He did not tell me where it is though. All I know is that it is under the dash and possibly on the passenger side behind the glove box. I have the part and need to make a quick replacement. It is Toyota part no. 87106-06070. I need a diagram to help me locate and know how to get to it. Thanks.