What was that corpse-like thing sitting in the desk near the end of the video game Ikari Warriors

In the original arcade version of Ikari Warriors, the level containing that... thing... was supposed to be a secret Nazi base hidden in the jungle. It was altered in certain versions of the game, especially for the NES, to remove the Swastikas and other Nazi references from the game. Similar to what they did with Bionic Commando. Now as to what that thing was... I like to imagine it was Hitler's corpse or something just as conspiracy-minded. That would make Ikari Warriors much like Bionic Commando plot-wise, except that the corpse doesn't come back to life. Seriously though... in the NES version they made that thing way too hard to destroy. I wasted so many grenades on it back in the day! Good question though. I'll bet even the designers of the game did not know what that... corpse... was doing there.