Hi Carl
We had a 98 Pat. The reservoir you mention was just for the power steering in ours. We had the rear radiator.
Take a small flashlight. Open the battery compartment. Just inside the opening and on the right side wall, look for a gap. With the light you might see the reservoir for the jacks, if not try looking rearward from the passanger rear wheel well. It should be right there. It will look like a pump and cylinder with a ling neck on top and a one inch plastic hex cap all likely in black.
Clean the debris from the cap, remove cap and add fluid. Dont over fill, just add until the ding alarm stops. All jacks go up fully and then lower just one jack 6 inches. Then add fluid.
PS
I had an oldfashioned pump oil can with a flexable tube on it. Pull the trigger and it pumps. It was perfect for adding a few ounces to this tough spot.
Keith