1990 Deville: changing power steering fluid

Is there a common way to change the power steering fluid on these? When I put in a new radiator the only power steering line I could see was a hard line that went by the battery and made a loop in front of the condenser and then went back toward the steering rack.

Most would say why worry about the power steering, just run it until it breaks, if it breaks. But as hard to work on/crowded up as this car is I would like to do everything possible to extend the life of the power steering system.

I have also thought about adding a power steering fluid filter.


Any thoughts?