Changed my mind. Decided to go with the high current switch mounted
near the toggle switch at the helm. If I decide to add deck switches
or remotes in the future, this should make it easier. The line-up on
the hot side is now: battery, windlass circuit breaker, master
windlass power switch, relay, and windlass. Except for the power
switch this all came with the windlass.

As noted by DSK the wire was a major cost and pain. I was able to get
by with 1 AWG, but that is 1/2" in diameter. After the relay which I
mounted near the helm, I still had half a boat length to go where
three wires of this thickness had to be routed through the cabin
without screwing up the aesthetics.

One essential tool is a lug crimper for 1 AWG. Could not have done
this without it. These are pretty pricey, but Ebay comes through
again.

JonasB