It’s part of the anti-billow system. The other part is that little arm sticking off the roller. If the wind starts to unroll the awning that arm will rotate and catch on the ledge of the piece attached to the trailer wall, preventing it from going further and unrolling more. When you put the slide out, it’s moved far enough away from the wall by the time the arm gets pointed towards the wall that it misses the ledge.
I hope that makes sense.
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Jeff & Peggy
2019 Coachmen Mirada 35BH
Avid campers since 1999
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