Chavez from Ameca, Calvillo, possibly Jalpa?

I am trying to go further on my Chavez family. I hope any of these names sound familiar to someone out there. My ancestor Cesario Chávez married Maria Paula Lopez y Ayon in Ameca on 17 September 1800. Through his marriage certificate I found he was born around 1762 in a place called Valle de Huejucar which I found, thanks to info from other members, is the same place as today’s Calvillo, Aguascalientes. His parents are mentioned as José María Chávez and María de la Encarnación Velasco. I haven’t been able to find his baptism certificate from that time since the records from Calvillo don’t go that far back.

On the other hand, I found two baptism records from nearby Tabasco, Zacatecas who may be Cesario’s sisters:

Luisa Feliciana Chavez, born in “el puesto del Capulin”, baptized on 1 sep 1748. Her parents were Joseph Chavez and Maria Velasco.

https://familysearch.org/pal:/MM9.3.1/TH-1-15087-18372-13?cc=1804458&wc=3P9Z-JWL:147565601,147565602,147565603

Jospha Maria Gregoria Chavez, born in “Ojo Caliente”, baptized on 27 apr 1754. Her parents were Joseph de Chavez and Ma. de la Encarnacion Velasco. Guejucar, aka Calvillo, is also mentioned in this record.

https://familysearch.org/pal:/MM9.3.1/TH-1-15087-19620-14?cc=1804458&wc=3P9Z-JWL:147565601,147565602,147565603

I assume Ojo Caliente is the same place found near Calvillo, but what about El Capulin? Is there a location with that name in that area?

Are there other parishes in the area where I should look as well during this time period?

While browsing in Ameca, I found a marriage record for Jose Maria Chavez and Maria Rita Vitalia Alvarez on 15 may 1790. He is mentioned to be from Jalpa and born around 1768 and has the same parents as my ancestor Cesario Chavez and the two girls previously mentioned:

https://familysearch.org/pal:/MM9.3.1/TH-1-18566-73201-19?cc=1874591&wc=3JZ2-829:171936901,171936902,173969801

Unfortunately, I just realized that there are no records of Jalpa for that time period, either. Am I getting out of luck? I will appreciate any advice.

Steve in NC