Magnavox TV. How do I go about getting a free download or by mail manual for my Magnavox TV. I

Question

How do I go about getting a free download or by mail manual for my Magnavox TV. I just don't know where the 'audio out' cable is located. I check the back of the TV and I see a white, red, yellow and black cable cords. I have a DVR connected to the TV. I am in the process of installing a home theater system and need to know the specifics. Thank you.