I would use caution and consult a structural engineer in your area to find out if this is even legal and the type building materials required.
Most large buildings the divider walls are not structural or nothing you would cut through outside of a torch.
For example in my area any electrical changes at all require a licensed electrician and conduit or proper cable type (NO nm cable unless inside conduit).
The construction material is also regulated to be fire rated type of construction.
I was not able to see the symbols it shows as a black box when I blow it up
Is there smoke alarms there? Out away from the wall I doubt it would be a electrical or plumbing chase. Is there anything you can see in your unit to provide a clue to what it is?