Hello all,I am kinda new at having a Chinese tractor so i am sorry if this is a stupid question.I just purchased a farm pro 2425 from an individual that also knew nothing about it.I have been reading the manual because i am going to change the fluids in it since there is 110 hours on it and nothing has been changed.I was looking for all the places to check fluid levels and turned something i probably shouldn't have.Right between your leg's as your sitting in the seat straight down there is a black knob i thought may be a dip stick but it wouldn't come out.Could someone please tell me what this is and what i should do since i turned it and don't know where it was?