While it's not a fully interactive panel, he can use the circuitry left behind from the ceiling mounted turret to at least access the local systems. It takes a little while, and a bit of creativity, but he can unseal the nearby bulkheads; this turret was tied into at least that network. Once through, he finds a more robust panel, that he might be able to hack into; a quick check of the schematics reveals that this vertical fortress extends for almost twenty floors, beneath them, and the next three are on high alert, for intruders, already, and have been evacuated of the 'civilians', likely the organics. As this floor is on high alert, only the most basic functions are available, to prevent someone invading it from hacking into it, though with a bit of trial and error, he can alter an IFF code to recognize him as a friendly, though he can't do anything for his constructs.