Backend issues / Querying On Related Fields

Hello,

I have a couple of custom post types setup, with a relation between the two using an Ultimate Fields WPObject.

I can easily extract that from the object with the field, but is it possible to query the reverse?

EG - a product has a testimonial linked.
I can easily show a testimonial on a product page, but I want to add a link from a stand-alone testimonial page back to the product.

Thanks!