How to list a particular credit

I am wanting to edit / add a credit to episodes of a series. The show itself is fictional and not a documentary - it's an anthology crime show with each episode showcasing a different crime case. One actor "hosts" the show at the start, middle and end provides an overview of the case etc - this is a cutaway segment from the rest of the enactment of the crime and investigation. Previous contributors have listed his credit as Self - Host. However that has resulted in his credits being moved to the Self category when it should have been under his acting credits. Additionally some celebrity guests have also "hosted" episodes in the past. Should these simply be credited as Host or should they be left blank or should they credited with their actual name?