A plastic frame 13 for electrical connectors has an open end 14. A closing plate 18 of plastic is connected to one side of the open end by means of a living hinge. A cover 24 for covering electrical wires is integrally formed on the upper side of the frame 13. During assembly, the closing plate 18 is opened and each connector 1 is inserted into the frame 13 by sliding protruding members 11 along guiding grooves 15. Then the closing plate 18 is closed and latched. The electrical wires coming out of the connector 1 are simultaneously collected together under the cover 24. For disassembly, the closing plate 18 can be unlatched and each connector pulled out one by one.