Managed to grab a couple hours tonight before holidays.
I stripped out all the dodgy wiring in the console and binned the lot. Nothing worth keeping apart from the battery leads and even then they will get used for something else, 16mm2 cable, a bit thin imo.
I took out the dozens of screws holding the console to the deck and tried to lift it out, no chance. It's bonded to the floor with what must be sikaflex or its equivalent. I lifted the whole boat up off the trailer when I tried to lift console.
Plan b will be when I get back.