A Time of War is set around the Jihad era for the most part (though you can use it for other eras with minimal fuss for the most part). Since the Jaguars by then had been pretty much exterminated as a faction, except for a few remnants that really fit into the Bandit or Dark Caste, they aren't part of the book (same with Clan Mongoose for instance).
What you're looking for is in Era Report 3052, which has ATOW affiliation information for that time period, which is when the Jaguars are alive.