Thank you for contacting Telerik Support.
To change the default find expression generated for any specific element you can 'Edit Element' from your Elements Explorer. There is an article explaining how do so in our online documentation under the Find Element subsection. The change you will need to make will be specific to your scenario which I cannot resolve from your screenshot and logic alone.
In order to help with your issue more specifically, I would need more information. Please provide a copy of your test and access to your application. Also, please provide your failure log and a copy of the DOM at the time of failure. You can export these to file from the failure tab for your test and add them to a .zip archive.
Please let me know if this helps.
the Telerik team
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