Where is the subconscious mind located?

This may be a tricky one to properly define, but I'll try.

Based on my scientific understanding, the subconscious mind is responsible for various autonomic operations of the body. These include beating of the heart, circadian rhythm and various daily hormonal fluctuations.

1. Is the term “subconscious mind” a proper umbrella term used to describe the mechanism involved in such autonomic operations?
2. If there a single place in the brain where the subconscious mind is located or rather is it made up of various parts of the brain each responsible for different things?

I realize that there are different scientific domains that touch on this topic such as neuroscience, psychology and even metaphysics. I'm interested in any perspective that can be shared to help uncover knowledge.