An assembly for offsite construction of a building, a connector for use in such an assembly, along with a method of manufacture of such a connector, and a method of construction using the assembly. The connector includes first and second buttress elements defining, respectively, a first location portion and a second location portion. The first location portion and the second location portion are configured, respectively, to receive first and second structural elements extending at transverse angles to each other. The first and second buttress elements each has first and second opposite side walls defining an access space between them for a connector to be accessed. The second side wall of the first buttress element and the second side wall of the second buttress element together define a third location portion configured to receive a third structural element extending transversely to the first and second structural elements.