Rear air bleeder on 94 G20t

Is there a rear air bleeder cap on a 94 G20t? Everything I've read (including my FSM) states that there should be a tee in the hose near the firewall with a cap, but my car does not have this. This picture (http://www.se-r.net/heat_ac/images/bleeder.jpg) shows what I think I'm looking for, even though it is from a high port engine. Was it moved or removed on low port models or on G20 vs. other Nissan models?