Where can reconcile and/or logon accounts be linked to an account?

 Reconcile and logon accounts can be linked to an account within the platform settings and safe settings. The platform settings define the parameters for its linked accounts in either the Target Account or Service Account that requires them. When linked accounts are specified in the Target Account platform, they appear in the CPM pane of the Account Details page. Similarly, when they are specified in the Service Account platform, they appear in the CPM pane of the Service Account Details page1. Safe settings are also involved in the process of linking accounts, as they determine where the accounts are stored and managed within the CyberArk Vault.

References:

CyberArk Docs - Linked Accounts1

CyberArk REST API documentation on adding Reconcile and Login Accounts to an Account