INDYCAR 2021 by GuzikGP 'Champs' Files?????

[leeleeniner15]

Where am I being instructed to place these files?

"OK now you can drop champs files into:
Your PC > Documents > Assettocorsa > Champs" Thanks for any Help?
https://www.racedepartment.com/downloads/indycar-2021.43317/