This should be a nice easy question for most of you guys out here, but since I'm still learning, maybe someone could explain it to me. I started installing a transmission cooler on my truck. I mounted it according to the directions but the directions instructed me to connect to my transmission oil return line from the radiator. Which tube is that? Top or Bottom? My chilton manual doesnt provide any usefull information about that either. Also have you noticed that there arent any extra holes in the radiator support through which to run the cooler hoses? What did you guys do?