Yup...looks like a best buy install to me. I also was in "the industry" for quite some time. We once received a pt cruiser. After being to best buy for a gift her husband got her, she had the car towed to my shop. The husband had purchased a remote start for the wife. Brought the vehicle in to have the "professional" install done. Left the store and could not turn the steering wheel. Called best buy and they gave her the "not my problem" approach. She had had work done by us in the past and had the car towed to my shop. The "professional" installer had zip-tied one half of the remote start brain to the steering shaft under the dash and the other half to a wire harness, "locking" the steering wheel in place!I sold and installed car audio for 7+ years and used to see stuff like that all the time, best buy and audio express were always the worst "professional" installs.
But at least yours appears to only be ground wires.