They do simply pop off.
There is a slight indentation in the lower tube where the spot with the (2) dimples fits.
Take a Flat Blade Screw Drive and gently TAP along the Lower Edge of the Chrome Cover to PUSH it back and off the lower tube.
Take you time and work around the entire cover in a circle tapping gently until it pops off.
It might look like it is a twist lock but it's not.
Right Click and OPEN in a NEW TAB to Enlaege Pic.