That is a puzzle!
I must admit to looking myself and not seeing anything obvious. Did you take the sliding drawer all the way out, and look inside the cavity that's there? That's where I'd look next. Hunter customer service can certainly tell you. Don, not sure if you have seen the couch in a 41. It truly is a couch, one-piece, complete with rounded arms and built in back, just like at home! It's not the usual boat "bench seat" type of thing with hatch openings etc.