I originally made this for my Ls swapped 91 z28 Camaro due to the lack of firewall room i had remaining and in search of the cleanest look. This is the perfect box to house your bulk-head connectors when relocating a battery to keep from drilling several holes in your firewall. This box was printed using abs but any heat resistant filament will due, the opening for the bulkhead on the plate are 1 1/2in and the plate secures to the box using 4 small screws. Inside the box is a divider to separate your negative and positive bulk heads and cable there is only 1 hole in the back plate to run your cable through to minimize having to drill additional holes. I used 2awg cable they both enter the box through the same hole and then the other cable has two routing holes through the divider into the other compartment. the box itself has a hole in each corner to run a bolt or self tapper through I tried to insure you could use anything and left room for drilling out the existing holes to use any hardware on hand. If you like the print please be sure to give it a like!