Almost certainly. Even these dummies don't run screws into a pressure hull. Also I believe the hull is titanium with carbon fiber weave over it, not full thickness carbon fiber.Did you all notice how the electrical cables going back to the propulsion units were routed inside fluid-filled clear vinyl tubing? Those cables would see the same pressure whether or not they were inside that clear tubing so I wonder why they did that? Despite the possibility OceanGate Titan may have failed catastrophically there is some interesting engineering on display throughout. I even saw a RAM Mount attached to the inner wall of the carbon fiber tube. I can’t believe they screwed into the carbon. Maybe there’s another liner inside that they used for attaching stuff like that and routing wires, etc. kind of like drywall over wall studs?
I don't think real DSV builders would even chance welding brackets and stuff to the wall of the pressure sphere. They may build, basically, a floating cage inside to mount everything to. Wonder if they have to design in clearance for the hull to compress...