A very quickly thrown together replacement pole connector for the cheap and nasty cloth covered wardrobe sold by Otto's in Switzerland (Faltschrank mit rollbaren Türen). The supplied connectors suddenly break when the wardrobe is loaded with clothes in a cold environment, such as an attic. The steel pole diameter is 13.5 mm.

Model dimensions are: 40.45 x 40 x 42 mm

Hope it helps and or can be modified to help.