Sierra Mojada, Coahuila

Yes, This is WAY WAY off topic for this group but I'm helping my second cousin. I'm looking for baptism/birth records for 1888 and civil records for this area start in 1892 so I'm looking for baptism records and don't see it listed as a location in the church records.

If anyone is researching Coahuila where do you think folks registered their children for Sierra Mojada?

thanks,

Joseph Puentes