Customise + New Topic Button

OK, thanks for this but when I go to admin / customise / text and search for New Button, it says there are more than 50 options and I should refine the search.

So, when I put in + New Button, it only comes up with one option, which is js.user_activity.no_topics_body and not the one I want.

So, can you tell me which of the 50 + options is the right one for me to edit to update the + New Topic button on the “Latest” home page, or advise how I should modify my search term? Thanks.