connected

(of an object) To join (to another object): to attach, or to be intended to attach or capable of attaching, to another object.

"I think this piece connects to that piece over there."

Similar: affix, join, put together, unite

(of two objects) To join: to attach, or to be intended to attach or capable of attaching, to each other.

"Both roads have the same name, but they don't connect: they're on opposite sides of the river, and there's no bridge there."

(of an object) To join (two other objects), or to join (one object) to (another object): to be a link between two objects, thereby attaching them to each other.

"The new railroad will connect the northern part of the state to the southern part."

(usually with "well-"): Having favorable rapport with a powerful entity.

Having relationships; involved with others.

Involved with organized crime, specifically someone not (yet) working for a crime organization, but referred to as a "friend" by made guys/wise guys inside the organization.