Hello,I have a 1977 75HP Johnson that I purchased from a local dealer.The remore control is set up for the port side and I need to set up for starboard side.I found from an old post that I need to drive the handle out to switch sides.Hope that is right.So...I removed the three screws that appear to hold the case together,and it is not seperating.Is the another screw someplace I am missing?