I believe you will find them in the back of the boat. Access is through the two large hatches on the stern. I remember checking all of the lugs for tightness a few years ago. It helps to be small to fit inside, but I know it's possible because I have climbed inside many times. I'm 5-10 and 180lbs. You can access the underside of the winches and check for tightness of those lugs by opening the cockpit lockers, inverting yourself, and looking up.