Check the wording in the game
The official store and developer press kit do not identify a sorting object or character named Jenkins, or give a destination for it. The search phrase alone is insufficient to establish an item category. Film trivia and character descriptions from other works do not answer a Tidy Up the Town placement question.
Use the sorting context
If Jenkins is the wording you see in your installed game, note the exact label, language and nearby stall. Take a screenshot that includes the object and its surroundings. The game is about returning scattered items to the correct market stalls, with appropriate items automatically selected when shelving.
Request a precise answer
Ask in the official game discussion hub with that evidence rather than following a guessed destination. An answer should match the same object and game version. Meanwhile, consult the marketplace overview and missing-item checklist for general sorting checks. This page does not claim a confirmed Jenkins location.