Customer Contract: Which privilege to expose the Contract Management in springboard and navigator?

Summary:

In a custom job role, what's the privilege needed to expose Contract Management in the Springboard and Navigator?

Content (please ensure you mask any confidential information):

Salesperson already have access to view all sales contracts through the Sales Party Management duty. However, the standard duty does not show the Contract Management in springboard and navigator.

I want to expose the Contract Management in the springboard and navigator for them via a custom job role, so that they can use the Contract Management workarea (advanced search, search by text) functions. What privilege should I add into the custom job role?