101Leafy researched the game with the Hilltop Works fan translation patch, English translation by Cargodin
Socketソケット
Socket is item 39 of the game's item table, in the Items group. The script never names it.
The game gives it no description.
It never shows up on its own in a talk with a picture, so it has none here.
Item table: Illuminating Eye Socket Yellow Light Bulb
English translations by Cargodin for Hilltop Works Fan Translation Patch: https://www.patreon.com/hilltopworks/posts/kowloons-gate-160555525?collection=18503