“So Bezalel and Oholiab are to work, along with every wise-hearted man in whom Adonai has placed insight and understanding to know how to perform all the labor for the service of the Sanctuary, according to everything Adonai has commanded.”
They were responsible for the Ark, the table, the menorah, the altars, and the implements of the Sanctuary used in service with them, the curtain and all involved with its use.