I had the same problem with my Basscat Sabre. I purchased my Ultrex from Jones Trolling Motors in Texarkana, Arkansas. Mr. Jones removed the trolling motor plug, but installed a on/off switch on the batteries that cuts power to the trolling motor when not in use. He told me that it is potentially dangerous not to disable the batteries to trolling motor connection even when you turn off the tolling motor switch. That's just what he told me.