Making changes to right sidebar in files app


I’ve a problem changing a certain thing on the right side menu of the files app on nextcloud. There are five tabs on this right sidebar (talk, activity, sharing etc). I want to change the text that says “talk” and the logo of it here. Now I already did this with the actual talk app by changing the translation files and images in the talk app using a theme. However I can’t seem to find the files I need to change to make this change in the right sidebar on the files app.

Do anyone know what files those are or how I could go about changing this?