How to Connect a 3-Core Armoured Cable to a 3-Pin Socket?

[el capitan]

Hi

I am trying to find out a way to connect a 3 core cable (armoured cable) to a 3-pin socket... what would be the best way to go about doing this ??

any help would be appreciated
regards

 

[dlgoff]

What is the cables gauge and what is type of socket? A picture might help.