That looks like the pressure line. Take a look at this diagram and then the picture of the replacement line and see if it is the same on the vehicle.
Let us know if this is not it but that connection to the pump has a bolt that goes through a union nut which would make it the pressure line. I included the part numbers for the power steering hoses as well.
Images (Click to make bigger)
Saturday, October 24th, 2020 AT 6:16 PM