so here is the deal..i was cleaning my rear pads. once all done, i put the wheel hub back on and test. once i started to rotate, i could hear some (minute) metal on mental touching. so i though i'd investigate. i could not tell s***. so then i took off the wheel hub and thought i'd test the brakes, i pressed on the brake pedal and the pads extened outwards and then fuild started to squit. i was like oh s***!!! anyhow, now i can't get the "thing" back in and without putting that back in, i cna't get the hub on. please help. attached are some pictures.
p.s. this is urgent. my car is still on jacks.
this is the part i am talking about
and just to give you an overall picture.