[CarlG]

I use the same one as Dennis, I also got it from Amazon, but you can get it from most any marine supply house. Brand name is BlueSeas. I modified mine so that 6 of the terminals are switched with the ignition, the other 6 are on all the time. I mounted it to the firewall in the engine compartment with Velcro tape. If you want something smaller (ie: less than 12 terminals) they make all sorts of configurations.