Another Upholstery note: The newer the boat the more complex the interiors, with that comes different approaches to how to fasten. If you look at the part & there seems to be an easy access to the backside it probably has a stud with nut reachable from behind. If you cant find a stud but cut your finger on a sharp point of a screw on the back side look for pleats in the vinyl where the screw is, "spread the cheeks" & look for a surface driven screw. Many open bow sections & newer boats use clips where the panel slides down into position then a single screw is used to hold it down. I have a new Ski Nautique in the shop & found hidden screws accessible through a drink holder that needed to be removed to access the screw. Sometimes you have to be a detective to figure these out. My answer to the above request is generic, unlike the automotive industry where everything is stamped, & punched in the same place every time, boats are built by people & and at best have a jig to place fasteners, otherwise an upholstery installer may place a screw or stud in the same general area but never the same exact spot.