Q? bout Battery relocation for people who've done it

[CoasTek240]

Ok... i've been working on my battery relocation for about a week now.
most people purchase the kits for $55-$130
well i purchased my materials for $

-28' of 2 guage power wire @.64/ft ($17.92)
-summit racing battery box $11 ($11)
-pos.,neg., and ground terminal ($3.74) @advanced
-(2) 1' long all-thread bolts 3/8" thick .58 each ($1.21)
-(4) 3/8" galvanized nuts (had them)
-(4) glav. washers (had them)
-zipties $0 (had them laying around)
-soudering iron and souder $0 (also laying around)
use existing battery tie down

total: $33.87 (sturdier and better quality than the kit.)

***i've got it setup so i battery is back there but not secured yet.
two questions?
1. i have not secured the battery yet, does everyone whos done this b4 to their s13 reccomend to secure it on the right side of the tirewell on the little shelf above the muffler(it fits perfect)?

2. where do i run the line out of the engine bay?... i was todl there was a tiny pre-existing hole in the firewall to run it through... but i spent about an hour looking and could not find it. i have it running out the top of the hoo din through the window for the time being.....(if there isnt a pre-existing hole.. does anyone have any reccomendations fro where to run the line.. perhaps drill a hole in the firewall..? nothing too hard)

-well i'll post pics soon as i get this thing complete