I'm sure it's no suprise... but I've never even seen an engine mount... but I would assume it's something that (if I knew where to look) that I could see.

Yes?

How many engine mounts are there?
Any way to narrow down which one it might be without looking at each one?
Will it be apparent if I look at it? (it could be broken a little or a lot but I really don't know what I'd be looking for)