Vaults
The Anti-Titan
Within the Anti-Titan vault is apparently a standard TV-unit shell. It's locked down and inert; there's nobody inside. It's inside a storage chamber with a glass front. An explanatory plaque says:
Remnants from Titangrinder 1.
Shells of 15 unsuccessful candidates, plus the 1 successful candidate's pre-Titan shell, were partially re-assembled and re-serialised to preserve anonymity.