The pieces of the device float in midair, connected by beams of energy. Through the space between the beams, you can see into a hallway, the walls of which are made of the same weird carved stone as the device itself. From this fact (and if not this fact, this exposition) you conclude that the device is some kind of portal, leading to the underground parts of El Vibrato island.
The pieces of the El Vibrato portal lay strewn on the ground. Looks like the thing has run out of juice.
There is a round depression in the base of the portal -- it looks about the same size as those strange stone spheres from the waters surrounding El Vibrato Island.
Stick a sphere in it.
You insert the sphere into the base of the portal. There is a crackle of energy as it sinks into the device and vanishes. The beams surrounding the portal glow more brightly.
Each of the combat encounters here have special responses when El Vibrato punchcards are used on them. See their individual pages for details.
References
-the look of the portal and the strange stone spheres could be from the disney movie Treasure Planet. The portal being the gateway and the sphere being the map.