The instructions do not have enough pictures with the direction of the back, which side to screw on. I had to take it apart again and re-twist it.
These photos should help to give a more detailed explanation of my experience.
Wall bracket ONKRON SN14 for TV 32"-65", inclined, up to 68 kg, black
34 Review
ONKRON D101FS monitor mount 13"-34" desktop, up to 8 kg, tilt, swivel, black
64 Review
Mount ONKRON G160 for two monitors 13"-32" desktop, 2 x 8 kg, gas lift, black
52 Review
Wall bracket ONKRON M4 for TV 32"-65", tilt-swivel, up to 35 kg, black
46 Review