Customizing the web widget chat label

Hi, 

I'm attempting to update the text of the web widget in the bottom right. Currently, the text displayed is "Help", but we would like the text "Chat." 

I've been directed to this article: https://support.zendesk.com/hc/en-us/articles/4408827579034-How-do-I-change-the-text-on-the-widget-button-on-my-website- where it is stated that the default available selections are "Help" "Support" or "Feedback". 

For further customization, I was directed here: https://support.zendesk.com/hc/en-us/articles/4408832257562#topic_chz_bbq_mx where I can see that I'm supposed to change the chatLabel setting of the launcher object. 

From there, I was able to find an example here: https://developer.zendesk.com/api-reference/widget/core/#launcher 

However, I'm not sure where to input this command. Do I just add the script tags to the raw code of my guide someplace? Or is there some way I can send the data with the API using cURL like many of the other endpoints?