Just changed all 3 batteries out in 2009 Champion Bass Boat model 183CX. All wires back where they belong except one mistery wire on master battery. It is orange with blue or green stripe and bundled with red wire that feeds main power panel. Everything works as far as I can tell. Main concern is this wire for positive or neg side of battery.

check the back of your fuel guage, I think that was the color on my 82 184.

you can look thru here and see if you find that color combination

https://www.google.com/search?rlz=1...Ewj-s_3d-u_vAhWmFFkFHTcBDDkQjJkEegQIAxAB