HELP--winterization

we have an 03' moomba mobius witht the standard 310Hp OMC engine and transmission set up. we have winterized everything else already and have been successful in doing so. my problem is i cannot find the transmission cooler line and its supposed to drop down to 10 degrees in the next day or so, even thought our boat is inside its still real cold. any suggestions on where and how to drain it? thanks

Follow the water hose up from the bottom of the boat and you will run into it from between there and the impeller. Pull the hose off of the bottom of it and it will drain out.