Dark Heresy 2.0 Advanced API Char Sheet

As per the title, the character sheet says that it requires the advanced API, and links the github, however I have a question, how am I supposed to load the 2 scripts into the game. Also the 2nd script is just a Javascript itself, and I am not sure where to load that as well. The second question is, does the advanced API only need to be done by the GM? Or does all players need to have them as well? This is a question also in case that the API mod needs a roll20 subscription.

If there are any mod requirements, those must be loaded into the API console(Pro req) by the game's creator or assigned co-gm.  Individual js files can be loaded and saved separately as well.  The API console is accessible from the game's settings page.  Only the GM can/needs to install.  All players in the game will reap the benefits of any mods installed.  Cheers

Thank you so much!