If you manually lift the hood cover into the upright position (using the electric switches behind the drivers seat to lock it, rather than the centre console button) and then lift the back of the hood up manually too, you will see the 'hidden' carpeted area where the hood stows.
Lift up the carpet and on the passenger side you will see the reservoir bottle tucked away. The min and max lines should be visible. It is important to do the hood raise manually to get an accurate reading, so you are not pumping fluid to the hydraulic rams.
Try and lower the hood cover and hood on to you (you may need a torch then) so it looks like you have your head stuck in the car! Having the hood cover and hood as low as possible will give you a more accurate reading as the hydraulic fluid will be back in the tank, not the rams.
Top up the fluid (Dextron 11D type power steering fluid) thorough the brass filler (13mm socket).
You may want to check the rams for seepage too.