thang010146 | Handle for retractable canvas roofs @thang010146 | Uploaded 9 months ago | Updated 2 days ago
The mechanism can only work if the black cable does not slip on the green wheel.
Turn the brown nut to tension the cable when it slips as shown in the last scenes of the video.
Wrapping the cable more than one revolution on the wheel is a good way to prevent slipping when necessary.
See a real handle:
youtu.be/j10qT1G46FI