...is the e brake cable. no fluid there, so its just getting wet.
I might have a similar problem. I've never heared of leaks in this area, but I am convinced this is where a leak is originating from. (Photos have been rotated 90 degrees CCW from uploading, so picture them 90 CW)
Hopefully the picture isn't processed from posting up, but here is a shot looking up toward the caliper (rear, driver side) at the p-brake cable connection (tire would be to the right). You can see a drip forming. It that's not to say it didn't come from somewhere else, but a following picture will show how dry the brake line area is. In fact, by looking at this sitting down, I see a second spot where fluid is building and will actually fall from. There is a rubber seal (?) in between the release spring and caliper, and it is very wet.
Below, flexible brake at caliper. Sorry for the washed out picture, but it can be seen that it is not soaking wet.
I don't know the internals of this p-brake/caliper assembly, but I am guessing there is a shaft going into the body :th_lipssealed1:, and that it leaks. I' will 99% be replacing the caliper and flexible hose.
A quick view from an arbitrary caliper (SVO) shows an actuator, seal and shaft etc... I am now convinced it is possible.
Any experience with the ease of rebuild kits?