Gents, a cautionary tail... Do not mount your wires on the inside of the frame rail. Top is fine, over the wheelwell is great. Do not take your positive power from at the starter, connect all the way back to the battery.
A few years back we took a few friends through the local "Jeep Trail" which has a rather nasty mud hole at the very top. One of the guys with an NAS D90 with 35s pushed his way through the centre of the hole only to hear crackling and have smoke coming out from under him. A 3" log had pushed up from the muck and lodged itself between the frame and the positive cable, forcing it onto the hot V8 exhaust and immediately melting the insulation and grounding the positive to the downpipe. Needless to say he put it in park, vacated his kids, and we waded in with a 1/2" wrench determined to yank one of the leads off the battery and avoid a fire or worse.
That was successful, however he was still seriously stuck, and whoever had installed the winch had wired winch power from the starter rather than back to the battery, so we could not just disconnect the winch positive under the drivers seat. The result was as dead pull with no wheels turning out of a muddy pit before we could get it on stable enough ground to get underneath and disconnect it properly.