What causes power steering fluid to leak?

Pale pink when cleaned up with a white paper towel. Doesn't feel oily or greasy on my fingers. Would brake fluid leak be that close to the front. Would it be coolant?

How do you tell what level of Res? It is a solid metal with no level markers on it. Small plasic neck about the diameter of a nickel where cap attaches.

it is a closed system, all of them . not gonna leak unless pressure inside gets higher than normal or there is a fault in the system . this sounds like trans fluid or power steering and at those locations sounds like where trans fluid lines go into radiator. check with clean paper towel to highest point where no more fluid, then down toward the front. leak is on that arc and or spinning off a moving surface . wipe dry and see where it starts to get wet again , if not, travel some in the car and check again, you can zero into the spot

to chek power steer fluid, look down narrow opening to ring at botton of fill cover .. full at that interior ring , low if below it ...