Trouble With Rear Bush? Leaking

[R32skyline93]

hey everyone

ok im not sure what the exact area is called but i went to go get a leaking tyre fixed and the young clueless runt jacked up my car on this part of the car pics below

when i got it home i noticed hydroylic fluid leaking from this part as first i thought it was from the jack he used as it seems to have sprayed under the body a bit also

so wiped it off left it but now its still leaking a week later and i think they may have damaged something its at the rear passenger side pics below aperntly to fix anything there the whole lot has to come off concidering it wasnt leaking b4 hand im pissed

Thanks for any input

Graham