Lots of marine manufacturers have gone to using yellow for NEG instead of black. Black DC neg and black AC hot in close proximity have caused a lot of problems for people not knowing much about marine electrical.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
Bitter Gun Owner