Went with running the battery cables from rear cargo area to engine bar thru frame. Ran two 1/0 wires sleeved in 5/8 heater hose
Unknown pain in the a$$ job this became. The unibody and dog house were two separate pieces. Had to cut an access hole in floor and cut away some metal so we could feed it from one to the other.
Flipped back up part of the cut out. Will cover with a piece of sheet metal and rtv
Where the lines came up in cargo area
Engine bay wired up. Extra wire ran for future 2nd battery