I knew that USA and Mexico each get 4 auto bids, and Canada gets one. Hadn't really looked much into the others until just the other day.
Five of the seven Central American countries each get one auto bid. So that uses up all but two.
One of the two remaining auto bids goes to the Caribbean, where all of those countries have a giant tournament to fight over their singular auto bid. Then the other three Caribbean semifinal participants enter into a second tournament with a bunch of Central American teams.
In this second tournament each Central American Country gets two auto bids except for Belize who only gets one. For Belize and Nicaragua the second tournament is their only possible path to a champions league bid, since neither country gets an auto bid to the main champions league tournament.