A Junction Box is a gameplay mechanic item found in Mafia III.
Gameplay Usage
Junction boxes are used for wiretapping districts in New Bordeaux. They are marked on your main map by the 
icon. To wiretap the area you will need to install three TL-49 Fuses into each junction box.
Their locations will appear on your map once you've passed within close proximity to one, otherwise the locations for all junction boxes will show once you've received your initial briefing from John Donovan for that district.
Trivia
Information coming soon.
