Air Leak
I recall always "feeling" air movement in this area, but have always chalked it up to convection. Those connections you circled are very cold and if you are in a warm/humid place, the air around it will cool, descend and all the other air around it will move.
Feeling cold air blowing out by the suction line under the hood is normal as these cars age. They have foam seals at the evap case to keep as much air as possible inside the case. As these cars age they harden or fall apart all together and the air leaks start.
Bout all you can do for the air leak by the lines is get some evaporator black asphalt tar tape dum dum from oreillys and mold it into the area around the lines. IF you ask them at counter you'll get deer in the headlights looks. Tell them to go look at their HVAC book and its in the back. It's in a 2" wide roll.
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