Bow acc panel switch

[emeryrob3]

I have a 2011 z 521. Front bow acc switch isn’t Hooked to anything.
I’m adding a humminbird 360 to trolling motor that suggests being on a switch. The fuse block behind bow panel has several open
spots how do I know where to attach leads from my 360 that would be connected to switch? Do I just keep
Moving leads around? Or am I totally off base? Thanks for any input. On a side note for some reason the 360 has
two black wires and one red. Not sure what that’s about

[BassCPT]

I've got that same year and model. There should be a loose orange/blue wire for your positive and use one of the grounds on the bow terminal board for your ground wire.
Check your wire diagram on the battery compartment lid to confirm. "Bow Acc"

I've got my hydrowave connected to this accessory switch.