Query CPT with CF value stored in custom table (Bricks Query Editor)

Hi,

I have a custom post type called testimonials. I'm using the CPT for customer testimonials and also to list customer logos.

The data for the custom fields are stored in a custom tabled called 'testimonials' I need help writing the query in Brick Builder's Query Editor to only query posts where the custom field 'customer_testimonial_switch' has a value of '1'.

I cannot get this to work.

Here's documentation from Bricks on how to write a query for custom posts using the Query Editor but they don't show examples of using it to only query posts with a custom field value in a custom table.

Here's a screenshot of the documentation page.