My "new" Cat 30 had no low oil pressure signal when I bought it and now I know why. There is no alarm in the panel. I have one and know the oil pressure switch works because I wired it up in the cabin to check it. Now I need to install the alarm. There should be a lt blue wir going from the oil pressure switch to the negative terminal of the alarm. I found it leaving the engine but nowhere behind the panel. I will find it and connect it to the negative terminal. Now I need to connect the positive terminal to a switched positive connection. Where does it connect? I think it connects to one of the switch terminals? If so, which one? Thanks.