On my cockpit panel, there is a separate panel with the port and starboard engine trim switches. To the left of those switches is a third switch. Its part number/description is BODY, ROCK SW DPST MOM (note - indicates a type of rocker switch) (PART OF PANEL 845818)(TRAILER) The owners manual does not refer to it specifically and I have not used it. No indicator light and when I press it nothing seems to happen. Can someone help me as to what it is for? I cannot describe the insignia on it - looks like something pivoting on a cam. Thank you.