Where is reservoir to add fluid for the hydraulic jacks

The reservoir on my coach is in front of the front steps. Extend the generator all the way. Stand on the passenger side of the generator and look left and down. It's dark there so its hard to see. The tank is oriented left and right with the three valves used to bleed the jacks inboard of the reservoir. The lid is attached to a small tube neck sticking out the top of the reservoir.