TLS cert for SBC acting as client in TLS authentication

Thanks for your time, I am setting up TLS between 2 organizations, not related but both uses Oracle SBC. For TLS authentication my side SBC is acting as client whereas company A is acting as server. I create certificate-record and import root CA certificate (provided by company A ) and create TLS-Profile. Since my SBC is acting as client and mutual authentication is not desired, I by-pass CSR process. When I do “verify-config” I am getting error for end-entity-certificate. Can you please explain the importance of end-entity-certificate in my scenario, is this error can be ignored or do I have