https://www.prdh-igd.com/en/pionnier/36292 is his actual pioneer file, which gives a location, both old style and new. You enter old style only on profile. And the son married in location as per the profile with pending merge, USA only created in 1776 and didn't have Illinois territory in it yet.
No Fichier origine for him. Tag your question with France, and Research assistance, not Illinois or Canada, since any data on his birth would be in France, not here.