How do I make it look like there is steel cable wrapped around this pole?
I’d probably start with the helix preset from the Add Curve: Extra Objects addon.
Or it might be the Curve Spiral: Archemedian.
That’s the one I’d use. Helix only does one turn, and to get more out of it one has to jump through a bunch of hoops which isn’t worth it unless one explicitly needs a helix, like for modeling DNA.
And then shrinkwrap the spiral curve so it sticks to the pole.