Like I said there doesn't seem to be any immediate damage so I was really just worried for 24 hours. Could have been much worse.
Here is the location of the firewall boot at the back of the battery compartment. I circled it in green.

And to answer your question about the battery - the terminals were not far enough forward to be able to mate with the factory harness terminals. You can see in the above photo that the wires now come from behind the battery rather than in front and the factory 90 degree terminal bends have been removed from the original harness.
Here is the location of the firewall boot at the back of the battery compartment. I circled it in green.

And to answer your question about the battery - the terminals were not far enough forward to be able to mate with the factory harness terminals. You can see in the above photo that the wires now come from behind the battery rather than in front and the factory 90 degree terminal bends have been removed from the original harness.