I dont think those D rings will be strong enough to hold the winch down over tim. They are there to stabalize your toy during transit. I would consider bolting it to the floor. Power to it.. I would run 0 ga wire from the battery to it for that length of run.
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
140 days boondocking in 2016
211/2015, 196/14, 247/13, 193/12