95 e300d steering box leak

[connerm]

I've had a few leaks on the garage floor in the past month or so. After removing the sound panels, I discovered a drop of steering fluid on the hex cap bolt on the steering box and one drop on each end of the steering stabilizer shock. I doubt the shock is leaking. The pic isn't great but it shows the steering box is wet. I took the pic from underneath. The drops on the garage eventually dry up and get sticky, but the stain remains. How to fix the leak?