well i went to drain the rear drive and noticed paint chipping around a sticker so i peeled off the sticker and there is a screw so when i was going to drain the water i unscrewed that screw well when i tried to put it back there is nothing there for the threads to grab on too. and now i look at my manual closer that was not adrain plug anyway i cant find out what it is because its not in any of the books i have its on the port side of upper housing. water did come out of it though. help me please