electric cable support in mast.

[Noelio Abrunhosa]

Hi
Tomorrow i am replacing the navigation light halfway up the mast and i was concerned of the weight of the cable  on the connections.
how can the cable be mechanicaly clamped so it doesnt pull on the connections?
once i open the light fitting might all be obvious. i got the combination led fitting from furneaux .

regards

Abby