As I recall they act just like good ol' roller shades in the house (if they still exist.)
Easiest way to tighten them is to raise them up as far as the tension takes them, then remove them, roll them up manually the rest of the way, reinstall. Repeat if needed.
One end is a round rod, the other is a retangular bar which locks into place.
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Ed & Joie
2004 Vectra 40KD
Freightliner Chassis and Cummins ISC
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