Not sure why this SWA is terminated as it is, could it be:
1) I did not have an SWA gland?
2) Do SWA have their own special glands?
3) I did not have a gland that was the right size.
4) The conductive armour does not need to be earthed.
5) Cheap PVC tape is a good substitute for insulation, protective sheaths and SWA.
6) The use of a random new hole does not affect the structure of the switch case.