The element <groupCode> indicates the physical grouping of wires connected to the same contact. For example, where multiple wires are connected to a terminal stud using multiple ring terminals, each wire connected to the same ring terminal must have the same group code (eg, A). Wires that are connected to the same terminal stud but to another ring terminal must have another group code (eg, B). This means that an identical group code indicates wires, which are physically connected to the same ring terminal.