I solved this issue by purchasing red and black 10 gauge wire long enough to reach from the winch to the battery on the truck. I attached red and black clamps the same as you would find on a battery charger and just raised the hood, unwrapped the wire from the trailer and hooked it up to the battery. When done, I just re spooled it on the trailer and closed the hood and away I went.
This prevents any serious damage like burning your truck to the ground if installed wiring carry heavy amperage were to get in contact with the truck frame and causing a fire. If you do go with fixed wiring use fusable links at the battery to prevent any surprises. Just my 2 cents, Cheers, I.I.