How can I add custom qualifier in Territory Matching Attributes?

Hi,

This is related to the territory management at service level.

Since I couldn't get any response there, posting it again here expecting some positive response.

I have a requirement to add a custom table column as one of the territory qualifier.

I would need to check against a specific custom table column to perform territory assignment at SR level.

We are using R12.1.3

Can anyone guide me how to achieve this?

Thanks

Arun