Was able to get to the engine as suggested. Pretty much confirmed that ive had squirrels try to set up a next on the engine block. Can see they were gnawing on some of the plastic electrical line protectors. Hopefully did not get into any actual wiring.
Please let me know if anyone has a proven rodent repellant that I can use to keep them away in the future.
Again, many thanks to everyone! Your support on this has been great.
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