[chriswood1900]

For the sake of originality, I want to keep the Plessey connector, so I took it apart, sleeved each of the conductors with a Hellerman Sleeve and ran an earth wire back out to attach to the screws on the grip. The inside of the body was insulated with a plastic sleeve so that should a wire come loose it cannot easily touch the body. The earth wire was continuous from the cable to the tag so if the solder joint fractured earth continuity to the body of the connector was maintained.
That was the best I could come up with, thankyou to those that provided me with some information, hopefully this thread will be useful to others.