I have my rear calipers apart with the piston out... after looking at the internals and the shop manual i cant figure out where these go... i dont see anything in the piston that look like the top one and dont know where the oring goes.... any idea?

part kit i got is from maztrix
FDY1-26-44Z

 

nvm figured it out.. top is for the speed sensor and the o ring is all the way in the back