I haven't really looked at many winches and how they're wired up. Seems to be different schools of thought.
My Warn winch recommended install with no more than just its control box direct to battery. No fuse, no relay, etc. Could be interpreted as no protection, but could also be an advantage with extreme simplicity with minimal dependencies and components to go wrong in the case of needing to pull?
Yeah, there are definitely several acceptable solutions. Most winch manufacturers are recommending a hard 300A+ on/off switch under the hood on the battery positive main lead, but not all. Carbon is actually supplying these switches in the 'kit' box, as are a couple others if I recall. The idea being the switch is 'off' for normal use, and turned 'on' manually at the trailhead, then turned 'off' again at the end of the trip. I'm not a fan of stopping, lifting the hood, or having to remember to turn it 'off' later.
Since I'm running in cab controls, and these shouldn't be 'live' unless I overtly enable them, I figured I could add a tiny bit of complexity in exchange for ease of use.
Current plan
A 300A slo blo fuse I had sitting around from my stillborn LTO project. I'm in the if it's a red wire it gets a fuse camp, and since I'm probably going to have the winch high amp lead hot all the time the truck is on, it's a good idea in case of carelessness, accident, etc.
A 500A (continuous) solenoid (switched by IGN).
A manual in-cab on/off on the controller box ground (winch on) (running via a relay, as the in cab switch requires 12v to light the On LED, but I digress)
Control options
wireless remote
wired remote
in cab wired remote via in/out momentary (which are further run thru two relays so they can't be triggered at the same time).
Interestingly, Warn actually sells a basic solenoid solution (with a puny 120A continuous solenoid though).
While I'm doing all the winch stuff, I've relaid out the plan for all the current and future needs and will be busy for a few weeks setting a new standard in disorganized and untidy wiring solutions.