[Dnick]

One or more of the motor mounts on the Ridgeline is fluid-filled. I don't know if that is one of them or not (motor mount on that side). I believe the fluid from the mount is a yellow-green color. Maybe 'sop' some of that leaking liquid with a white paper towel to check color.

Otherwise, you should be able to use a flashlight & mirror to look around/under the components mounted there to trace the liquid trail?

 

[Dnick]

Well, I just looked at a parts diagram, and that side mount near your leak is the most expensive of the 3, so I'm guessing it might be fluid-filled? It costs just over $100 (depending on which OEM source you use of course).

FYI, the little square thingy in front of the mount is the "side stopper dynamic damper" that works with the mount.

Your PS reservoir/lines are just forward of all that. It might be easier to 'visually' diagnose if you has a larger field of view in your picture.... that is, include the are forward of the area you showed. You want to know if there is fluid leaking our of your reservoir or from any point on the hoses. If I had to blind guess, I'd say you're more likely to have a PS fluid leak than a motor mount leak.

Like someone else suggested; clean it up & then watch to see where the leak comes from. Start your engine & turn the wheels lock-to-lock a couple of times to get pressure in your PS system working. You should be able to tell if there's a leak pretty quickly.