2000 20ci Missouri Ozarks. My boat is a closed bow. I got a new air horn to install on the passenger side bow. I fold the front passenger seat back down and I get a 12"h x 22"w hatch to crawl into. How do I remove the front passenger seat? I cannot find the screws or bolts that hold the passenger seat in place. If I can remove the front passenger seat & back assembly it will be much easier to install my horn and pressure tank. Any help? M&M