trunk mount battery install

[408 dart]

if i run positive wire inside car on drivers side, how do i get it through floor to starter or to selonoid

[Capt Jack]

I ran it under the drivers kick panel and used one of the long abandoned holes in the firewall.  it had a rubber plug in it, near the steering column left side.  sealed it up good after using some heavy wire ties on each side to keep it located but away from sharp metal edges

[jacks62440]

Why not keep it outside   You can just run it through grommets . Something else you could do is put a master disconnect switch under your seat as a anti theft device, Also a handy shut off. I put my cable through a hole in my frame inside a spare piece of AN 10 fuel line to insulate it