I recently purchased a 97 sea doo XP. My question is: Is there suppose to be a screw or bolt that is screwed into something under the jet ski. To me it looks like a threaded hole. the location is below the seat and right in the indented area where the water comes into the craft for propolision. Is this clear. I am very green and I need to know if I am missing something there. It also looks like it had some black sealant of something like that around it.