you are supposed to put the "banjo" on the gland before the lock nut (after gland terminated) you then connect an earth wire via a suitable connection (crimp eye and nut and bolt) to the banjo.
you would do this if you were using a plastic box to bring in the swa cable.
if it is a metal box all surfaces should be cleaned of paint and the gland tightened. this also assumes the metal box is earthed
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