Red dot on nismo bushes

Does anyone know as to why the red dot on the nismo tension rod bushes.
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someone spilt paint on it .


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It's on both bushes.

 

Likely just a qa mark.

 

This.

 

indeed, you'll find it on the base of soft drink cans too

 

Found a picture with the red dot

Picture with the red dot has an arrow on the opposite of the dot, i"ll be fitting them as per picture, thanks for your help guys.
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Hope this will help anyone who will be fitting the tension rod bushes.