Just flew these flights. Transit in Cali was painless. There is no transit desk or any signage. As soon as you disembark, you will need to find an AV ground crew member and he/she will check your passport and mark your boarding pass. Then she will open the door to let you in the departure area directly. No security check. Bags were transferred automatically. There were a few people doing the same so I guess it's quite commom in Cali.