I want to filter inventory locations based on site/contract in the manufacturing tools → tool instance. I have created a custom LOV attribute for location and added it to the page.
I was also able to create a filter based on a hard coded site/contract value and this works.

But I want to pass the site/contract value listed in the tool instances tab to filter Inventory locations.

I need help to figure out the syntax to pass the site value to the filter. Please let me know.