accessory switch

Hi. I have looked and looked and looked and cant seem to find what is hooked to the accessory switch on the helm? I understand the accessory DC switch on panel inside turns on minor DC accessories such as cigarette lighter ports. However, I cannot figure out what the Accessory switch at helm...

I have a 290DA 07 that the previous owner have the under water lights wired with the bilge lights, I hate that every time I turn them on I know the bilge lights are on for no reason, the question is how to wire the under water light to one of the accessory switch on the helm switch panel, has...