Any guesses where this grease might be coming from re: passenger-side wheel?

(EDIT: looking at the pics again I think it might be the outer boot at the very top of the inside that has a small hole...I felt around the boot but probably didn't touch that spot)

2007 PRIUS - 350K miles

I still haven't taken my passenger-side wheel bearing apart and re-installed the dust cover for the brakes. I went to look at how it was doing and noticed heavy-grease all over inside of the wheel and some of the suspension components. I replaced the passenger-side axle and that seems OK but there is heavy grease everywhere.

Gotta put it off til' tomorrow but curious what to even look for?



OR

is it the shock-absorber that has broken from the top and shock-grease is coming down onto the wheel from the shock-absorber? seems more likely because its falling down on the suspension but not sure what shock-grease looks like.

It's dark outside now but at sunset I checked underneath my car and took a few pictures.

 

this pinhole must be really small. can it be repaired with any type of seal/glue or do I have to replace the axle again?

 

UPDATE:

Took off the wheel but still can't find the hole or how so much VOLUME of grease came out without a big tear in the CV boot. As you can see there are clumps of grease and inside the wheel is coated with grease. Only thing that makes sense is it that the clamp around the CV boot became loose through a very small area the grease came out.








Another problem is that my temporarily duct-taped speed-sensor came undone and its been destroyed through wear. If you've ever wanted to know what the inside of one looks like dissected....here it is....

COULD ALL THE GREASE COME OUT OF THE SPEED-SENSOR HOLE BECAUSE THE SPEED-SENSOR WAS OUT? That doesn't seem to make sense either.




thankfully I have another one available on my PartsPrius but are bigger issues able to arise from this not be replaced?