Here is the attic. I don't think I have trusses.
Red line is wall in question. Blue line is the wall I believe to be the load bearing wall as it spans the house and those supports attach to it. Green arrows are the original roof that terminates on the brick wall where my garage was added. 1 - Dryer vent, 2 - Hot water heater vent, 3 - gas line that goes down the wall in question. I don't think this wall is load bearing.
Is there anything I have that I could join into, or should I just get close to a regular roof vent?