Nice video👍Short simple and to the point.

Nicely done love the video thank u

Can I use battery jumper cables, just the cables as PO wiring harness

could have been better explained, so that your explanation matched your drawing. Just connecting the negative posts of the two batteries would produce a common ground.

I am in desperate need of some guidance for my pontoon. I have 5 batteries total. I want to make sure they are all hooked up correctly. I have 4 things but possible 5th that’ll require power. I have one Pecko 2 way switch already installed - 1, 2, All and OFF. I also have 2 onboard battery chargers. 1 is 2 bank and 1 is a 3 Bank. I can send pics or specs if needed. 1. Motor/ignition 2. Trolling motor 80lb thrust 3. Garmin Depth Finder 4. 8 speaker w 2 12” subs stereo 5. Possible re-hook up bilge pump Main ? Is how to hook up all of these appropriately if you can give any advice I would be forever grateful!

Why did you put the red line to the black on engine? Drawing😢

I was told you don't use any negative wires. I I almost hooked up negative and the guy said you would've blown the back of the boat off and he says he's seen it done so be very careful when you hook these up.