Pump counter addition to existing bilge pump. I just needed to hook the counter wire onto the bilge indicator light on the dc panel and power the counter. Next I added the control switch for the new backup bilge pump. Notice it has an alarm and separate counter. The panel is powered by a fuse connected directly to the battery and you can’t disable the automatic pump by switching this to off. The schematic is here http://www.mammothcondos.com/Catalina-320-bilge-pump-electrical-schematic-v1.pdf