If you study the photo carefully you can see the boss at each end where the vent or plug are inserted. They are roughly inline with the word 'BATTERY' printed on the top on the left. So yes that battery has vent holes. The one against the firewall should have a plug in it and the front facing hole should have a vent trap or a hose that directs any spillage away from the car body. We have seen the damage that the acid can do.
My AGM battery has vent holes in it, as the chemical reaction in all lead/acid batteries produces gasses.