problem with usb host shield

hello im working on a project and i need to utilize the host shield. but the problem is i can't and not only dat i am trying to add the codes for the host shield found from this project for witch you can find the codes form GitHub - moyuchin/WiiRemote_on_Arduino: Wii Remote, Arduino, USB Host Shield, Circuit at home the codes i need are usb.cpp and usb.h, wiiremote.cpp and wiiremote.h so can someone please help me on how to upload those into the host shield.
thank you for your help

Cross posted with Project Guidance section,

Please don’t do that , wrt your question it fits far better in the Project Guidance section. So please remove this thread ,

Thank you.