So it starts here, on the driver side most coil:

Then it snakes it's way over to here.

Note how harsh a drill hole it is
From the inside it looks like:

where it then runs to

where it appears to go into the diagnostics somewhere.
I found this today when I was going to start doing the install for my amplifier. Looking over the firewall for holes to put the 4 gauge wire through I saw this. It's definitely not from factory, but knowing the previous owner of this vehicle I know for sure they did not do this. I am thinking that it is from the Autostart, but I'm not entirely sure.
My plan at this point is to unhook the battery, cut the wire, drill out the hole to 5/16ths, put in a grommet, run my 4 gauge through it, and reconnect the wire. It should look more professional, remove the sharp edges that are damaging the wire, and allow for a nice clean hole for the amp wire to run through.