FI-TV-COS Travel Management Integration with FI

Dear Forumers!

I'm from HCM and at present working on FI-TV project. In Customizing there's a IMG which defines consequency between wage types and symbolic accounts in FI (Travel management -- Travel accounting -- Transfer to Accounting). Can anyone explain when the transfer to FI occurs in Travel management? After what moment? My guess is that after travel expenses are included into payroll and have been calculated, they are transferred to FI... Am I right?

Hope for your assistance!

Regards,

Eldar