This appears on p.35 of Ampersand's book on the Staghound by David Doyle. I'm referring to the circular bracket, just below the tarp

Can anyone point me to clearer pictures on another Staghound or any other Commonwealth vehicle? It doesn't appear to be the US-designed bucket bracket -- it only seems to appear in Italian theater Staghounds so may be a local field mod -- but I could be completely wrong.
Anyone? Thanks in advance!