I just restrung mine last week. The assembler at Jayco didn't bother to use them mounting holes, instead they just gunned them in through some fabric and the plastic bracket. Interestingly they functioned just fine until the string wore out.
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2017 JayFlight 21QB
2021 Ford F150 SCrew 3.5 Eco, 157”, 3.55, Tow Pkg