The wiring to the switch at the helm is small which allows the wiring from breaker to winch motor to be stout and separate.
Then you should have a contactor (solenoid). Knowing Camano it stands a very good chance of being exactly where it was on the 2000 model year boat that I attached a photo of above (they seem to be very consistent). I was able to use 16AWG wire for my switch and remote base station "tang" wires. Vs. 4AWG for the main windlass wiring (top posts of contactor).
I have wired both a Lewmar and Maxwell windlass of similar size to yours and the diagrams were basically the same (as was the contactor).
I downloaded the installation/manual for what I think is your windlass, and they show that you could have either a 2-wire windlass, a 3-wire windlass, or a 4-wire windlass. (The ones I have wired have all been 2-wire windlasses.) That's the number of heavy wires coming out the bottom of the windlass.
HOWEVER, for all of the above windlasses, they show that "small wiring" is the same (in fact the contactor looks the same as both my Lewmar and Maxwell ones and the small wires work exactly the same way as both of mine). The small wires are the switch and control wires that come off of the three little blade tangs on the contactor.
If you are looking at the contactor from "the front" (as in the example photo I first posted) the middle tang is negative, the right side tang is "up," and the left side tang is "down." The Camano in the second photo also has the contactor oriented this way.
These wires can be tapped into at the source or come off one of the other switches or etc. AFAIK. They are not carrying much current. IIRC mine called for a 3a fuse on the positive wire; the diagram for yours calls for a 5a fuse on the positive wire (my windlasses were in the 700 size range so that's probably why).
So the rocker switch (typically near the helm) will get both an "up" and a "down" wire, plus a positive power wire. Things like foot switches where you have two separate things will each take either an "up" or a "down" wire and then also a positive power wire.
Another possibility for you would be to instead wire in a handheld wireless remote. Then likely you could just wire the remote base station "downstairs" and have the remote up on the flybridge (of course test that it works well like that but they seem to carry fairly well, though I have not tried one with a flybridge setup). Someone mentioned it above but you can get these remotes from Amazon for low prices (or the official windlass maker ones for like 8x that).
With the wireless remote you only wire to the base station, which, presuming the signal will carry up to the flybridge could be down below near one of your other already wired switches (or near the contactor).
Here are examples of both these types:
And a link to what I think may be your windlass manual. Sorry but I cannot figure out how to link to the actual pdf, but it's the 9th one down on this page:
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