ESS Leave request - Approving managers role

Hi,

We are implementing ESS leave request. For Managers to approve the leave request , what is the Autorization object required in the Roles. Has ESS delivered roles specific to approve the leave request?. If so , i guess we should differentiate Employee roles and manager roles. Can somebody advice me what's required in the roles for manager to approve employees leave request?.

Please note that we are not implementing MSS at this point.

Thanks

Ramesh