Amp rack dimensions and firewall hole?

I'll get you pics of that the best I can. It'll be hard to get pics under the truck.

 

Hey buddy!

I just posted all of the pics of my power wire & ground wire for my audio build in my thread.
https://www.tacomaworld.com/threads...lete-soundproofing-jbl-tear-out.567718/page-3

 

That gives me a much better idea. You drill into the bin area, or was that pre-existing? If drilled, what size and where did you get the grommet? I have 20ft cable, is that going to make it? Lastly, was that a pre-existing ground bolt? If not, where'd you get, size, ect?

 

I drilled a hole through the metal & the plastic in the bin.
20 feet of cable is plenty to get into the bin, but you might not have enough to get to the amp. I just look on google for 1/0 wire grommet I think a bunch of ppl make them. I drilled this ground bolt myself. On the grommet I used a liquid rubber/gasket material when I installed to make sure it's 100% water right.