How to link Custom Fields in Ticket view

How to link Custom Fields in Ticket view

Hi team,

I have created 2 custom fields in our Accounts Module would like them to show in our ticket information. 

We don't have Enterprise so I cannot do it via a workflow, but I know you can do lookup fields to link modules. How would I go about making this happen? We have the Professional edition of ZohoDesk.

Many thanks,
Sarah