I thought I might have trouble but the single bolt tightened down a lot seems to keep them in place just fine.

There is actually 2 holes already in mine.

I was considering using the 2nd hole with a washer to keep the bracket from moving around.

Thought about another bolt and washer to capture the bracket if needed but never had to do that.

Hope the pictures help explain.

Edit there are also some that mount on the closing wheel bolt itself. Not sure if this is their system or not but you can see them in the pictures at this link.

https://www.360yieldcenter.com/products/360-bandit/

https://www.360yieldcenter.com/wp-content/uploads/2022/05/003A4664_BANDIT_8.14.19-kms-scaled.jpg