Best place to go throught the firewall?

Don't have a picture but once you see it you should know. Take you glovebox off and in the bottom right corner is where all the wires from the fuse box and whatnot go into the engine bay. They go into a black rubber thing surrounded by a white plastic thing. The white plastic part will pop out once you just push in the clips on the edges. Once it is popped out just kind of manuever it so you can see the engine side. There is like a black little rubber thing sticking out on top, its sealed off and no wires go through it but just cut it off with wire cutters/scissors and the wire should fit perfectly.

I did this using 4 gauge wire and it was a perfect snug fit could not have been any better. Almost like its made for it lol.
 
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