There’s no openings, Mike.
With his new powers, Mike confronts his old boss at the factory where he worked and tries to get his job back. It doesn’t go too well.
Trying to uncover the location of this one-time factory took a bunch of detective work. This post from All Pictures Media shows the interior (which matches up to the elements seen in the episode). It also shows some of the exteriors of this location. Great, that should make it easy! Unfortunately, looking around the warehouse districts of Los Angeles failed to turn up anything.
It wasn’t until I was searching for other images of the interior that I discovered the name of the facility as Norris Industries, also known as Norris Stamping and Manufacturing Company. From there, coming up with an address was easy. It turns out the building underwent a retrofit in 2018 (at least the exterior), according to Google Earth, which is why it’s not recognizable with the exterior images from All Pictures Media.
MAP
(Agents of SHIELD S01E01, 2013)

