lifting rudder/ keeping rudder down

hi folks
brand new to the forum and new to the daysailer ll. about ready for first launch but have a question about the rudder. It's a two part rudder and the bottom part swing on a pin. I can't seem to figure out how to keep it from raising up when sailing or how to raise it up and keep it up when needed. There is no apparent way to keep it from raising up while under weigh. I've uploaded a picture of the rudder below. hope it works. Thanks in advance for any help. Wish I had never sold my O'day 192 years back. can't find another one now.
brand new to the forum and new to the daysailer ll. about ready for first launch but have a question about the rudder. It's a two part rudder and the bottom part swing on a pin. I can't seem to figure out how to keep it from raising up when sailing or how to raise it up and keep it up when needed. There is no apparent way to keep it from raising up while under weigh. I've uploaded a picture of the rudder below. hope it works. Thanks in advance for any help. Wish I had never sold my O'day 192 years back. can't find another one now.