What is this English wardrobe cabinet fitting?
Thanks for all the fantastic effort attempting to identify the photographed fitting!
I found that it's a bolt assembly, like those used in flat pack furniture.  The holes at 90 deg are actually four, could only see two initially.  They're in the bolt head and the metal box acts as a retention plate.
If anyone is interested I can post an image of the bolt partially unscrewed.
Thanks again!