FortiWeb - SNI settings

Hello,

Gotta question regarding ssl certificate and SNI configuration. Im gonna use SNI solution, do I need to setup "certificates" on main page when creating main policy? please see screenshot. From my point of view no, cuz all certs info will be pointed in SNI policy, but I wannabe sure. I did test scenario where I put  a cert there and SSL Labs showed me some errors, and sometimes I was getting "pr_end_of_file_error" - but im not sure if this was cuz of this.