I have 6b&s run all thru the interior of the vehicle and another line along the chassis to an Anderson plug at the back. I was hoping that would cover it?
Get onto a cable calculator and check the length / amp drawer (Redarc have one on there site)
All 6B&S is going to keep you warm on a cold day, maybe provide a dull orange low at night.
Need 2/0B&S as a minimum.
Double insulated heavy duty welding cable is probably better if you can get it.
Make sure you check the rating on the cable back against the manufacturer.
Most 9500lb winches will want 300+ amps under load, 6B&S only does about 140amp on a 1 metre run, you'll need 10-14 metres (got add there & back).