Hi Rob, I thought you might be the one to answer. 
I believe there were two clips and a stand up bracket with a round rubber ring (square section about 1/2") Maybe a 5/8" dia. hole? 
Some idea of what the bipod looked like would help. 
Anyhow, your info, and talking to a friend has helped. I have been reminded that "universal" meant they were set up for all roles, and as such all MkI* U.C.have the provision to carry the Boys. 
Thanks for the help.
		 
		
		
		
		
		
		
			
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				Bluebell 
 
Carrier Armoured O.P. No1 Mk3 W.  T84991 
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. 
Dodge WC55. 37mm Gun Motor Carriage M6 
Jeep Mb #135668 
So many questions....
			 
		
		
		
		
		
	
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