hi all, i have a 2007 320 sundancer and the stiching along the top of the rear seat bolster that rests against the transom is unravelling probably due to years of the boat cover fitting snugly against it. I can see two bolts in the back hatch where my power cord is, is that all that's holding this curved seat in? DO I take them out completely or loosen them and then the seat back pops or lifts off of them when they are loose? Thanks for your help. tom